I got 4806 playing two fights with:
Roy +4 +HP -RES, Camus, Fae +2 +SPD -HP, Berkut 4 stars 40+1
And the remaining with:
Roy +4 +HP -RES, Reinhardt +DEF -HP, Cecilia +ATK -HP, Berkut 4 stars 40+1
I beat my previous record with 4806 and I'm ready for 20 on 2702.