HOLY CRAP.
Just killed the colossem event for me. Successively having same opponents for same league/ one lower opponent = Serge_Fan and Schnuller100 (i have nothing against them as they are selected by AI) - BUT mind you these have WATER decks have full 5 Mythics and atttacks of girl from 1.5K to 2K. and girl with damage ability upgrade (Venus). Even with my best combo , now with coin flip I am not sure to win such a fight ( as HP is now reduced thanks to your upgrade -> one charged mythic hit from 5 girls = loss) .
Only way to get points as of now is from fights with lowest league opponent . while these opponents are changing, upper 2 seems fixed rotated with one other fully TOP WATER deck with Venus .
Colosseum is NOT TOWER for god sake - when is your team going to understand this basic fact. Restrict Mythic girl to one per deck/fight in these fights.