Nullify, nullify, nullify. Bait Maeve into the open, then hit her with the good ol' Nullify beam. More often than not, her Nine Lives will still be on cooldown, and someone else is gonna be there to kill her.
Tyra will have no chance if she faces 1 to 1 zhin, tyra can take advantage of her incendiary grenade to weaken the zhin counterattack and wait for her skill to be spent, then attack as quickly as possible.
Ash's main strengths are her high HP and her Knockback abilities. Pips Ult can take that away from you for 4 Seconds. If he Picks up Moral Boost, resilience might be a good choice as you normally have high HP and Damage Immunity with her Ult.
Jenos' healing is independent of his location. Expect him to flank your team while still healing his. If he tries to run away, don't try to chase the kill as he can waste time but instead scare him away from his team, lest he support in hiding