itch.io

Go down (to save time) and selectively rise the league rank to get rewards - this is the compromise you to have make. With 3700K HP i do not fear players in league 1 BUT one fight takes nearly double time/fight (4 or 5min in league1 vs 2min in league below 2). 

Coin flip (LUCK) in Tower fights actually means too much wasted time even if your opponent is weak. AND, if opponent has better HP/attack then it means almost automatic loss at the start of fight.

Enemy you are showing is actually one of the weaker ones  - as it does not have Venus with ability upgrade (x2 or x2.5 attack bonus). You will realize this once you level up some more and increased HP is enough to survive one turn hit from charged Mythic girl cards.

I am also in league 2.  I have about twice the health as you do and don't have a deck of all mythic and win most of the time.  What level are you?  I am level 39 now.