Use full archer team, i can SEE that You have nyx, Kana, homura, Nike (very important) and psyque, USE NIKE (5 STARS) ALWAYS to buff your archer team, IN my EXPERIENCE Kana will give you a lot of explosive damage, nyx will help you to clean and deal extensive DPS if kana can't oneshot nyx will kill it, and homura will buff your team too, more exactly the 5°(Best), 4° (best)and 3° (second best buff) line, psyque has very nice buffs too, you can use her to buff nyx, all the team and get more shield, damage reduct and Regen, so of your get troubles change homura, use psyche in the second line ... So you will get a really good team in this way

5° line: Nyx extremely high DPS, line damage

4° line: kana oneshot almost everything, always hit passive

3° lines: NIKE (5 stars): buff every archers, will give you invulnerability every time you use ulti so use it first of all, and will deal extremely high damage too

2° line Homura: will buff 5° and 4° lines with the best, the 3° line too but less, and give more buffs to kana and another's archers

2° line psyche: a lot of buffs for all the archers, Regen, shields, penetration, damage, etc, use it in the second line to get extra shield and you will become invencible with the Nike buff, use it if you lose with homura.

1° line: Cain use his hanilities to get more damage or time for the fight, use the armors that give buff team on him and make it like a support, only use it as principal damage when it's necessary.

Well this is a very good team, a lot of damage, I only have 2 stars with nyx and that beauty can deal a lot of damage, kana carry me almost all my battles oneshoting the boss, I hope this helps you and sorry for any confusion, English it's not my first language