Horse Emblem Team Help?

I dont run horse emblem, but I have played a fair amount of them, B!lyn and Reinhardt are fairly easy picks(get a +Atk -Spd rein when you can). I think that Ares and picking a bonus unit will help you even out your arena team.

For me, I run Reinhardt, Ares, B. Lyn, and Gunnthra. I could see replacing Gunnthra with Frederick. I would build both Ares and Frederick with defensive sets with Hone Cavalry. Vanilla Reinhardt + B. Lyn running Fortify Cavalry

BLyn and Reinhardt as attackers.Ares and Ephraim as interference/support? You've got a lot of good offensive characters, you need to round them out with some more defensive types.

Brave Lyn is a fantastic character, and you have a good type. Maybe consider giving her a Brave Bow. I have, and she's pretty badass. However, she is very squishy. It looks like you need a tank to pair up with her.

Sigurd is currently summon-rate-boosted. You might want to try for him. I don't currently run a Cav team; but I use Sig/BLyn as a 2-person team with Cav buffs, and they work great together.

The one I run is Lyn and Reinhardt with support. Siegbert and gunthra supported together and blade tome on gunthra
Swap out siegbert and gunthra for Liliana and Ares and your golden, be cautious though, Cavs have been nerfed into the ground in arena due to trenches aaaand the fact that we haven't had a staple to horse emblem as a bonus since WT aaaand awhile before then, so mixed emblem will be the wayto go for arena to ensure a bonus getsused

Lots of really good choices man

Are you planning to use the team in arena or for PvE? L.Ephraim can score fairly well with a galeforce set because the skills pile up so much SP and his BST isn't terrible to begin with. I wouldn't use him in a normal horse team because the Flame Siegmund's guaranteed double is awkward to use when trying to spam hone/fortify buffs. The +atk really plays to the heavy blade galeforce build, though, so he's worth playing on some team. Maybe some fliers who can reposition themselves to finish off targets he couldn't? Counterintuitively, Caeda can run a galeforce set because she has flashing blade built in to the Wing Sword refine; you'll probably have to give her a hone fliers or something though otherwise she might not hit hard enough to KO without effective damage. If you can sac a Y.Ike, brave axe QP Cherche would also be an idea, though I don't know how viable.

Back to horses. Somebody on my friend list featured his brave axe QR Frederick for a while. I found him extremely effective while playing grand conquests. Massive attack with death blow; 40-ish def (merged, I can't remember how much) so QR is pretty good. You have perfect IVs for this build. I'd be choosing between him and Ares.

Reinhardt is almost an automatic to me; the sheer firepower especially with hone cavalry is very hard to match. Can't say I'm a fan of LA Lilina (except the art); a bit slow for my taste. So maybe SM Eirika? The -spd is kind of awkward and I prefer her default weapon, but with hone cavalry and swift sparrow she's still doing not badly (if I remember the stats right, 33+6+4 = 43? plus another 3 if her enemy is at 100%HP). But if you find she's not fast enough then I'd probably go for the blade tome and just go for the one-shot. B.Lyn is fantastic; hits hard and fast, Sacae's blessing, etc. etc.

So I guess I came up with Reinhardt, B.Lyn, SM Eirika, and Frederick. They all want to receive hone cavalry; Frederick is the primary target for a fortify, and SM Eirika if you use a blade tome on her.