[Meglobob]

Another way of getting alot of gems is the luck-3/turmoil-3 combo, this gives you lots of gem random events.

You could always save up your fire gems as Abysia and reserch upto and cast eternal pyre.

Other than that search like mad and cast as many remote site searching spells as possible. Keep a eye out for any indie mages who have magic unavailable to you as well. It can be worthwhile sometimes to for example recruit indie druids and empower to lvl 2 so you can cast Haruspex.