I'm thinking about LR/TRing one of my characters into a pure caster druid (human). I've been messing around with some builds but not sure on Spell Focus+GSF vs Mental Toughness and IMT.
If the Spell Focus chain is worth it for a caster druid, what school is the best?
I'll add that this would be for EN/EH content or TRing again after hitting 20. Thanks!