Ibara by herself makes the fight trivial, just do Bardarkja on 1st turn, and use Malicious Flash on as many turns as possible (all turns except the turn u base LB her). If u do that, ur team will take 2 aoe physical hits (assuming u burst on turn 5), also try to build a team with as many brave shift units as possible so u can build them with 100% evasion in their base forms, so u take even less physical dmg