[K]

I'd be very interested in finding out how the Eval module works. It says "(Fat 50)", so it is making some sort of judgment about fatigue when it looks at Summon Imps (and since it is a B2 casting a B1 spell with 100 fat, the total is fat 50).

I suspect that "mayusegems=1" is a test for whether there are gems in inventory (which is probably an initial test for whether the spell can even be cast since it requires gems).

It doesn't look like it is a test for whether gems SHOULD be used because of weak opposition.