I use 4 teams + helper that are all in the 650-800 range. I use auto-run since I 3*'d it a while ago, but I'd say I get 3* about 1/5 times. I HIGHLY recommend if you're going for 3*, do NOT have people like Lilac and Dipladenia in your squads. Those spider webs at the top are there to buy you time if a squad goes toward the boss too early, you don't want your squads ignoring those.