hello

you can disable a skill on auto using the team preset ai setting 

as for the suggestions on the champion, will forward them for you

kind regards

He  would  be  to  op  if  it  worked  on  bosses    

Many bosses are immune to hp decrease. Secondly skill cannon't now decrease hp more than 50% of max enemy's hp. So lets say max 50% is for champions and mobs and we would add second treshold for bosses at 25% of their max hp.

What is cool is that a new Team Setup is coming out soon where you will be able to select which abilities are used based on which round of a battle it is. So you can choose to disable certain skills for the waves, or for the bosses. I am super looking forward to that, actually.