About Squad Assault 2

Dunno, maybe since there is a lot of new content these days people just haven't got the time to play it yet?
My teams were:
1- Celica 5*+1, S!Robin 5*, Mist 5*, Takumi 5*
2- M!Robin 5*, Hector 5*, Kagero 4*, Genny 5*
3- Cecilia 4*, Camus 4*, Xander 5*, Olwen 5*
4- Delthea 5*, S!Tiki 5*, Olivia 4*, Eirika 5*+2
5- Nino 5*+3, Katarina 5*, Mae 5*, Azura 5*+1

I had to try a few times before i did it, but it was fun.
Still, those stats sure are over the top, i remember one knight had like 80hp, like man, calm down dude.

The rewards are pretty underwhelming for how difficult it is, I guess people find that it's not worth all the time and effort needed for it. Plus, with all the new content coming out, people with rather spend their time on those
Teams:
1- Eirika 5*, Tharja 5*, Takumi 5*, Ninian 5*
2- M!Robin 5* , Sakura 5*, Gunter 3*, Barst 3* (only used those two for Harsh Command and Reposition)
3- Cecilia 4*, Xander 5*, Camus 5*, Peri 5*
4- Spring Camilla 5*, Cordelia 4*, Caeda 4*, (Filler)
5- Nino 5*, Katarina 5*, Kagero 5*, Olivia 4*
It took at least 10+ tries to do it. This was definitely a lot harder than the last squad assault imo, especially that last level (I was in disbelief when I found out we had to do a surviving level lol). Like you said though, it was still fun... yet painful.

The seal is meh...

1. 5 star reimhardt, 5 star s. Robin, 5 star linde, 5 star bride lyn.
2. 5 star kagero, 5 star mist, 5 star olwen, 5 star eldigan.
3. 5 star el nino, 5 star elise, 5 star lucina, 5 star azura
4. 5 star s tiki, 5 star b. Cordelia, 5 star sanaki, 5 star b. Cada
5. 5 star tharja, 5 star julia, 5 star hector, 5 star delthea.

I died the most times in map 2 lol.... last map with the heroes I had, I basically 1 shotted every r hing.

1.- 5* RobinM (Bowbreaker, no TA), 4* CorrinF, 3* Narcian, 3* lvl 1 Lissa
2.- 5* Tiki (Young), 5* Ninian, 4* Cain, 3* lvl 1 Serra
3.- 5* Summer Corrin, 5* Hinoka, 5* Minerva, 4* Palla
4.- 5* Xander, 5* Camus, 4* Ursula, 4* Frederick (pls find me a brave axe+)
5.- 5* Nino, 5* Lucina, 5* Ephraim, 5* Olivia

1. 5* olivia, 4* cordelia (swordbreaker), 5* faye, 5* cherche (brave axe, drag back)
Cordelia to get rid on ryoma, and cherche cleans up

2. 5* Xander (+3 def, vantage), psychic healer, wrys, 4* malachai
Malachai with wrys keeps mattew occupied, while xander slowly gets rid of the others

3. 5* eirika, 4* blade cecilia, 5* BCaeda, 5* reciprocal aid anna
Cecilia and caeda do most of the work, eirika deals with the green and anna is just supports

4. 4* narcian, 4* legion, 5* celica, 5* camus (+3 spd)
Legion is there for support but theyre all specific counters.

5. 5* tharja (+spd, darting blow, desperation), azura, rein (TA2, hone spd2), 5* nino (+spd, fury desperation)
They slaughter everything. (Having tharja here made the first map harder because i count reliably kill takumi and then have my specific counters clean up)

I burned 4 potions as a F2P before finding my winning combo:

Map 1:
5*Hector
5*Sharena
3*Serra
4*Lachesis (physic)
Sharena buffs Hector then cuts off North bridge. Hector takes out Hinoka then gets double healed as his Vantage cleans up.

Map 2:
5*Kagero
3*Olivia
3*Donnel
3*Azuma
Kagero daggerbreaks bottom corner then danced to safety. Then next round she kills the other thief and is danced to kill Matthew. Azuma heals. Final round, Kagero cleans up.

Map 3:
4*+1 Ursula (blade)
4* Berkut
5* Leo (hone cav and reposition)
4* Frederick (fortify cav)
Ursula kills Robin then Tharja. Frederick takes a hit from Green Cav, Leo finishes him off. Then Ursula kills Knight.

Map 4:
5* Nowi (Fury and HP seal)
4* Wrys
3* Narcian
4* Zephiel
This took me the most tries. Nowi books right to tank a hit and return fire on Camus. She will drop to 1HP so seal is mandatory. Wrys rehabs her. Next round she tanks the red mage. Meanwhile Narcian takes a hit from the bluebird. Next round he takes cover as Zephiel finishes it off. Then it's just Zeph vs. Michaelis for a few more rounds.

Map 5:
5* Camus (QR1, Swap, and Hone)
5* Xander (Armored Blow 3, QR1, and Hone)
4* Cecilia (blade, Darting Blow 3, Fortify, and Attack seal)
4* Clarine (rehab and Fortify)

Cecilia kills or seriously wounds the enemies one by one as they approach on the left. Eventually in R6 she has to take out the archer on the right. Camus and Xander work mop up duties on the left until R6 when they take out the red mage on the right. Ike and Soren are never engaged.
_______
Other seals can be placed where ever and if you have 4* or 5* versions of a lot of these it will be much less of a nailbiter.

Good luck!

team 1: 5* hector, lukas, 4* maria (mend, imbue), 3* tobin (does nothing but looks cute^^)
team 2: 5* xander, elise, 4* mrobin, berkut
team 3: 5* mae, 4* zephiel, olivia, frobin
team 4: 5* michalis, sharena, titania, 4* lilina (axebreaker1)
team 5: 5* nino (+spd, +3hp seal), +1 tharja (+1atk seal), setsuna (+atk, squad ace a seal), bride lyn (hone atk3)

(personally, took the longest to get team 4 together tbh. michalis with 63 hp and 32 spd was my biggest problem tbh. i wish ours was that terrifying^^
that being said, the squad ace b seal is just to show off in my opinion but hey, who doesn't like to do so~)