Just as an example, I was able to use THS-A = 90; Gain at Max (64), 1 under NULL most of the time. I had to reduce to about A=50, NULL and Gain about midway (30-45) to reduce the hotrocks.
These settings were with all the coils I used:
11" elite
12x8 EVO
17*11 Advantage
Sadie
15" EVO
19" EVO
Cheers,
Goldman