so, Mage, what will you do with all those gems?

[Zooko]

I've noticed that my mages will use gems in order to cast a spell that I've scripted for them but which is too high-level for them.

I've heard that they will also use gems in order to avoid being fatigued-out.

Will they use gems in order to get better results from a spell, like extra damage?

Will they use gems in order to get better penetration against enemy magic resistance?

I'm thinking of trying a spell which would require lots of extra gems poured into it in order to overcome enemy magic resistance. Is there any chance my mage will do the right thing?