I have played about 35 games so far.
I have played versus 4 different factions.
I have playtested with 5 different casters.
I have kept an excel spreadsheet to log my playtesting.
I am a scientist IRL and I believe that I have approached it with an analytic mindset.
I have playtested for other game systems before as well though I wouldn't call myself a professional.
You will find that my claims don't focus on possible fixes for the Mountain King. I know that it is bad. I honestly don't know what needs to be done to fix it.