Great game and concept. The battle system is there...
HOWEVER
Holy shit is the difficulty curve all over the place.
Infect++ is nearly unavoidable and a death sentence
Lock is frustrating and feels bad to deal with because it just wastes a turn. Your own infect should hit through the lock, it's a dot, I can't think of a single game where dots don't hit through shield type mechanics.
The multi hit pulse is basically useless because in addition to costing mana, it also has a harder input, and does less damage overall. It's not reliable enough to be a move to use and it's a risk in case you miss the input. I basically stopped using it after two attempts, one miss and one where it hit for minimum damage
Healing for random values feels bad, especially since the spread is so wide. Same for your max upgrade damage pulse. Rolling 3's is unbelievably frustrating.
If you're going to do damage windows, it should be tied to the input command. Better input, more damage. Like three levels of input. Miss, OK, and PERFECT.
EDIT: Another thing. There is lag between pressing inputs and the actual bar stopping. This is just absolutely unacceptable for a game with such a tight window of precision. Just... unimaginably frustrating to watch the meter continue moving after the input is pressed.