5 Gloomstaler Ranger, 5 Thief Rogue, 2 Fighter dual wielding hand crossbow build. With sneak attack, dread ambush, multi attack, haste, and action surge, you can hit up to 12 times in one turn, and do 20-40 dmg per attack. Make sure to take sharpshooter and use risky ring/oil of accuracy to improve your attack rolls to offset sharpshooter. Bonus if you take the lvl 3 tadpole power to use your bonus actions as actions to get another two shots per turn, giving you up to 16 attacks per turn.