Don’t know if this is a new idea, or an old idea.
Players are given a score based on event performance/raids/team strength (similar to war score) to determine tiers of people they can be drawn against.
Players select three teams from their squads.
All the players in the tier are randomly drawn against somebody else in their tier. The objective is to kill all 15 heroes. As a flank in the a) team is knocked out, then the flank for the b) team comes in. And so on until nothing is left.
Players are given a score based on heroes left, time taken. Score is compared across both players, highest score goes through to the next round that takes part the next day.
Sorry if this has already been suggested. If not, what do you think?