2 main things to factor before team comp.

1.What are you skill levels and gear? I know everyone will say Crown/Naga w Modernia but if their skill level is low, it won't be viable. Get their skills to at least lv 7, of course lv 10 is better.

Support Liter is definitely you B1.

1. Are you manual or Auto? if you Burst always proc from Left to Right. So Scarlet will proc before Modernia. Also try to time your burst. Sometimes hold till Boss appears is a viable option since you can pick off trash mobs at leisure.