My same Valentine Hector that I've been using a lot nowadays. Only difference here is that, aside from the change to Vantage 3, he has Fortify Armor equipped to buff my teammates' defenses. He is still quite a strong unit, not to mention he activates Glimmers automatically on the enemy phase when he gets hit due to his lowered cool down.
The unit that completed my Armor Emblem team, and one who is also shaping up to be the team's MVP! Fallen Hardin has already proven to be quite a strong powerhouse on my team with his incredibly good bulk and strong damage potential. He also has Ward Armor equipped to further boost my teammates' defenses. I wasn't sure which seal to give him, so I gave him Distant Def to improve his bulk against mages. It's done well for him thus far.
Another powerhouse member of the team. He has the lowest Resistance out of all the teammates though, but with the help of V!Hector and Fallen Hardin nearby, they can allow the Black Knight to better cope with mages compared to being on his own. He currently has Quick Riposte 2 because I went for a budget version, but when I can find another Quick Riposte fodder, you bet he'll get Quick Riposte 3 soon. He also Hone Armor equipped to boost my teammates' offensive game.
With the whole weapon triangle covered, I'd figure I'd add my one extra armor bow user that I have: my Halloween Jakob! This guy is surprisingly a
really tanky fellow! He almost rarely gets KOd in my experience using him, no matter if it's against melee units or mages. He often receives chip damage a good portion of the time! I think part of that can be attributed to his +Def IV. Sadly, with his added bulk also comes a bit of an unfortunate trade-off: his bane is Atk. Thus, I gave him two skills to combat this issue: Death Blow and Threaten Def. Both ensure Jakob can hit as hard as he can to counter the -Atk IV. The Attack Seal is also there to improve his offensive capability as well. All that said, H!Jakob has still proven to be quite a valuable unit on my team, and he even makes a pretty good Brave Lyn counter too!
The only other 5-star armor unit I have is my Winter Chrom, who still hasn't been fully grinded yet. He might be swapped with my H!Jakob if I ever feel like it, but considering how useful H!Jakob has been proving to me thus far, I think Winter Chrom won't be added to that team at the moment.
Another thing: I do not have any Amelias, so I'm unable to give any of my armor units Armor March at the moment (believe me, I really wish I had an Amelia for that reason). I'm stuck with using Armored Boots as the closest possible option to boost an armored unit's movement for the time being.