so, now, I've gone here, what are ur main team builds for right now.

Effie +Hp-Spd
Berkuts Lance +Res
Dual Rally
Ignis
Distant Counter
Wary Fighter
Drive Res
Armored Boots

Fae: +Spd - Hp
Lightning Breath+ (+Spd)
Dual Rally
Moonbow
Fury
Renewal
Drive Def
QR 3

A!Tiki:
Lightning Breath+ (+Res)
Dual Rally
Bonfire
TA 3
QR 2
Drives Res
Distant Def 3

This is my core team with an added

I have a mostly dragon centric team (with one healer)
Priscilla+6 (the glue that keeps the team together)
dazzling panic+
kindled-fire balm
atk+3
wrathful staff
drive def
panic ploy

Fae+4 (an emergency healer if priscilla dies)
lighting breath+ (res)
ardent sacrifice
iceberg
warding breath
renewal
threaten spd
quick reposte

Tiki+8 (basically godzilla)
lightning breath+ (res)
reciprocal aid
bonfire
fury
vantage
threaten atk
heavy blade

ninian (like the only fast dragon)
lightning breath+ (spd)
dance
glimmer
fury
wings of mercy
fortify dragons
atk smoke

Team im using now is my tt team
+atk-res mia+2
+atk -I forgot inigo ?
+def-spd L Ephraim
+atk -res chrom

Not the main arena team, but my main in-game challenges team is Lucy Emblem ft. Rob.

They've actually been able to beat most everything but Argus infernal, which I just hadn't wanted to figure out the exact pattern to complete. XD

(My F!Corrin isn't exactly at this point right now, but I do have all the fodder needed and ready, just haven't gotten around to inheriting it yet)

F!Corrin +7 (almost +10)
+Res -HP (also waiting for +spd - hp, but this is my second favourite IV set)
Lightning Breath (+spd)
Dual Rally
Aether
A: Warding Breath
B: Wrath
C: Threaten Atk/ Infantry Pulse
S: Distant Defense 3
(Summoner Supported)

Myrrh
+HP -Res
Great Flame
Reposition
Aether
Atk/Def Bond
Quick Reposte
Hone Dragons
Heavy Blade 3
(Fire blessing)

LL!Ephraim
Flame Siegmund
Reposition
Moonbow
Death blow
kj
Fortify Def
Close Def 3 (would give HB, but Myrrh is using it)

Any bonus unit

This team synergizes pretty well together, mainly with Myrrh providing Hone Dragons for F!Corrin's low damage and high speed, and Ephraim providing up to 10 extra defense for Myrrh's Great Flame to proc more (4 from fire blessing, 4 from Fortify, and 2 from ally support). It scores decently in arena as well, able to stay in tier 20 as long as I have a bonus unit that has high arena score. My team definitely needs more work though, such as Aether on Ephraim and dual rallys on everyone, but I'm really content with how it works.

Nice team by the way! Lukas seems really fun with guard, too.

(My F!Corrin isn't exactly at this point right now, but I do have all the fodder needed and ready, just haven't gotten around to inheriting it yet)

F!Corrin +7 (almost +10)
+Res -HP (also waiting for +spd - hp, but this is my second favourite IV set)
Lightning Breath (+spd)
Dual Rally
Aether
A: Warding Breath
B: Wrath
C: Threaten Atk/ Infantry Pulse
S: Distant Defense 3
(Summoner Supported)

Myrrh
+HP -Res
Great Flame
Reposition
Aether
Atk/Def Bond
Quick Reposte
Hone Dragons
Heavy Blade 3
(Fire blessing)

LL!Ephraim
Flame Siegmund
Reposition
Moonbow
Death blow
kj
Fortify Def
Close Def 3 (would give HB, but Myrrh is using it)

Any bonus unit

This team synergizes pretty well together, mainly with Myrrh providing Hone Dragons for F!Corrin's low damage and high speed, and Ephraim providing up to 10 extra defense for Myrrh's Great Flame to proc more (4 from fire blessing, 4 from Fortify, and 2 from ally support). It scores decently in arena as well, able to stay in tier 20 as long as I have a bonus unit that has high arena score. My team definitely needs more work though, such as Aether on Ephraim and dual rallys on everyone, but I'm really content with how it works.

Nice team by the way! Lukas seems really fun with guard, too.

(My F!Corrin isn't exactly at this point right now, but I do have all the fodder needed and ready, just haven't gotten around to inheriting it yet)

F!Corrin +7 (almost +10)
+Res -HP (also waiting for +spd - hp, but this is my second favourite IV set)
Lightning Breath (+spd)
Dual Rally
Aether
A: Warding Breath
B: Wrath
C: Threaten Atk/ Infantry Pulse
S: Distant Defense 3
(Summoner Supported)

Myrrh
+HP -Res
Great Flame
Reposition
Aether
Atk/Def Bond
Quick Reposte
Hone Dragons
Heavy Blade 3
(Fire blessing)

LL!Ephraim
Flame Siegmund
Reposition
Moonbow
Death blow
kj
Fortify Def
Close Def 3 (would give HB, but Myrrh is using it)

Any bonus unit

This team synergizes pretty well together, mainly with Myrrh providing Hone Dragons for F!Corrin's low damage and high speed, and Ephraim providing up to 10 extra defense for Myrrh's Great Flame to proc more (4 from fire blessing, 4 from Fortify, and 2 from ally support). It scores decently in arena as well, able to stay in tier 20 as long as I have a bonus unit that has high arena score. My team definitely needs more work though, such as Aether on Ephraim and dual rallys on everyone, but I'm really content with how it works.

Nice team by the way! Lukas seems really fun with guard, too.

(My F!Corrin isn't exactly at this point right now, but I do have all the fodder needed and ready, just haven't gotten around to inheriting it yet)

F!Corrin +7 (almost +10)
+Res -HP (also waiting for +spd - hp, but this is my second favourite IV set)
Lightning Breath (+spd)
Dual Rally
Aether
A: Warding Breath
B: Wrath
C: Threaten Atk/ Infantry Pulse
S: Distant Defense 3
(Summoner Supported)

Myrrh
+HP -Res
Great Flame
Reposition
Aether
Atk/Def Bond
Quick Reposte
Hone Dragons
Heavy Blade 3
(Fire blessing)

LL!Ephraim
Flame Siegmund
Reposition
Moonbow
Death blow
kj
Fortify Def
Close Def 3 (would give HB, but Myrrh is using it)

Any bonus unit

This team synergizes pretty well together, mainly with Myrrh providing Hone Dragons for F!Corrin's low damage and high speed, and Ephraim providing up to 10 extra defense for Myrrh's Great Flame to proc more (4 from fire blessing, 4 from Fortify, and 2 from ally support). It scores decently in arena as well, able to stay in tier 20 as long as I have a bonus unit that has high arena score. My team definitely needs more work though, such as Aether on Ephraim and dual rallys on everyone, but I'm really content with how it works.

Nice team by the way! Lukas seems really fun with guard, too.

My actual core team includes only two units, with two slots being filled by other units as I need. (Secondary core units?)

1. OG! Olivia (+5 merges, +Atk - Def, water blessed)
Wo Dao+ (+Spd)
Dance
Moonbow
Fury 3
Chill Speed 3
Hone Attack 3
Hone Speed 3

I chose -Def since a) it'll be a nice round 30 when she's at +10, b) she won't usually be in combat, and c) if she tanks something, the second part of my team will just top her back up to full health. I used to run Desperation or WoM, but since most of my teams are usually infantry, and she needs to be next to a unit to use her Hones, WoM rarely gets used, and Chill Speed is faaaaaaaaar too useful to not take.

2. Genny (+6 merges, +Spd -Hp, summoner supported & water blessed)
Gravity + (Candlelight Effect)
Physic+
Miracle
Atk/Spd 2
Wrathful Staff
Atk Ploy
Speed +3

She reaches 50 attack and 39 speed unbuffed. With the hone and Olivia nearby she hits 52 and 45. She tanks Rein very easily, especially if she's on a defensive tile. She crushes armors as well, and Dragons, though they're harder since they usually have more Res. She almost always hits twice, and if danced then she hits 4 times, which is enough to kill 99% of the time.

Often they're paired with Fjorm/Raven, W!Robin/W!Chrom,Grima/Lukas, B!Lyn/B!Roy, etc.

My go to four units, that also happen to work pretty well together.

Nowi +1 (+Def/-HP):
LB+ (Def+)
Reposition
Aether
Steady Breath
QR2
Threaten Res 3
DD3 seal

Zelgius (+Def/-Atk, wish I had a better IV spread on him):
Summoner Support currently
Alondite
Swap
Black Luna
Fierce Stance 3
Vantage 3 (might give him VF at somepoint)
Ward Armor/Panic Ploy 3
QR3 seal

Amelia (+Spd/-HP, might +1 her):
Slaying Axe+ (Spd+)
Reposition
Bonfire
Fury 3
Renewal 3
Armor March 3
CD3 seal

Lachesis (+Atk/-Res):
Dazzling Fear+
Physic+
Miracle
Attack +3
Wrathful Staff 3
Savage Blow 3
Attack +2 seal
She actually has the highest attack of the four currently at 52, while Zelgius and Amelia have 51 each. Zelgius and Amelia complement each other well as Red and Green armors, Nowi is just a super solid blue to complete RBG trifecta, and Lachesis provides raw power and heals.

Soleil: +spd -res
Firesweep+
Draw Back
Luna
Fury 3
Draw Back
Hone Atk 3
Heavy Blade 3 SS

Micaiah: +atk -spd
Thani
Sacrifice
Glacies
Dis Def 3
Vantage 3
Hone Spd 3
Dis Def 3 SS

Effie: +atk -hp
Brave Lance+
Smite
Astra
Death Blow 3
Wary Fighter 3
Hone Armor
Close Def 3 SS

Amelia: +def -res
Slaying Axe+ (Spd)
Reposition
Bonfire
Earth Boost 3
Seal Atk 3
Armor March 3
Atk 3 SS