I am fairly certain that the 'tweaks' you made to the tower has basically resulted in having opponents pitted against AI characters with unrealistic expectations, basically man-made world bosses from the developers under the pretense of being other players, but are, in fact, designed to destroy and crush anybody and everybody in the Tower.
How else would you explain my encountering four times by now mister Schnuller100 who has five mythic water girls leveled to the point of doing 1.5K+ damage with a single attack? Whose health is higher than most of the 'players' and who destroys my deck in two moves.
I was already not winning in the Tower, so trying my luck a few times I have encountered this exact same person at least four times in the past three days and I suspect that this is not a person, but something cooked up by the developers to force the player to pay them more money to beat their made-up premium players or Gatekeepers if you will keeping the Tower fights from being fair, balanced and properly designed. This is not PvP it's PvD... and if I wanted to get schooled by the developers of this game and their pitiful AI bots I would have just gone back to the Final Fantasy franchise.
Oh yeah, and fix the sip of blood card, every time I leave the tab and come back that power stops working and freezes forcing me to refresh and lose tower matches anyway.