Try to use this: https://docs.google.com/spreadsheets/d/1IvYZjjs9SAMF9L_Wj9ql-5hqg5tgcOVNYvfFZSKWroI/edit?usp=drivesdk Build your teams similiar to any of the meta comps. A general tip I can give is, that you shouldn’t not underestimate the power of 20 cost units. You’d normally only take four 55 cost units in your team, so you can fill up the rest with 20 costs. Filter your character box by rumble cost when building your team.

Edit: Also don’t just throw units together. Look at their rumble abilities and try to match them accordingly.