I'm a simple man when I see two retainers of opposite gender I pair them up.

Normally the Ai goes for triangle advantage but in some situations if it sees the chance to take down a disadvantage and then strike another weak foe it will go for it, therefore lower hp units can be used to guide them as they naturally target them first. 

Also if the foe cannot counter regardless, they will attack them as they see it as free damage. Aka they target who they can kill first, then they target who they can deal the most damage on.

On top of this they will always use their assists like draw back, reposition etc so you can always get them to go in a loop sometimes if you find they are in a pair for example.

hi, overall brave lyn is better because she has more mobility and access to cavalry buffs. not to mention the fact that she prevents distant counter from working.

as far as infantry archers go, bride cordelia is easily the best because of her extremely high speed and high attack. that said she needs a brave bow setup to really be a top tier threat, whereas the only thing brave lyn needs is to be lv 40. her default kit is literally perfect.

judging from the matchups its pretty much takumi and soren’s gauntlet to lose. they are both easily the most popular characters in the entire gauntlet, especially on tumlr dot com. 

Tbh its not possible to not make me not dislike Takumi anymore than I do.

But honestly, he won’t suck outright. Id suggest giving him brave bow still with death blow and swordbreaker, because he’ll hit swords like a truck then.