The all tank team run by a guy holding down the #2 spot: Teebo lead, Fives, RG, Barriss, and Sun Fac. 37,000 power. I think he throws that team together for defence, but it's actually easier to beat than his regular team, as I can sometimes kill it with my 29,000 power squad.
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https://youtu.be/solgUGxag6I
You cannot beat this team without p2w (as it is also p2w).