I play pythium atm in MP too and my conclusion is that it is not worth to protect theurgs .
Most important is to quickly get good summons with pythium .
Their national stuff sucks in battle .
Theurgs excel in research and forging but not on the battlefield
.
Earlygame they are ok with false horror spamming or frozen heart or similiar stuff but in midgame they are outdated once your enemies can defend easy vs. false horrors and can cast rain of stones , earthquakes or similiar spells .
Getting good summons quickly with pythium is not easy though also . The art with pythium is imho to survive until lategame well enough . In lategame pythium is one of the best nations but for a long period of 20-30 turns in midgame they literally suck . If enemies exploit this then you have a hard time with pythium .
Anyone feel free to suggest midgame pythium strats . Hopefully i will learn something new this way because i have no working pythium midgame strats
.