Yah everyone has their own styles. I tend to not like nations that need mage support for expansion. I prefer to hti research targets, and then support an army with just a few mages casting big spells, (darkness, life after death, relief etc).. rather than battle field things like magma eruption, fireball etc.
Everyone else is under the same constraints, so one must accept that research gets a bit slower once you've researched good battle magic.
Also, most nations are such that their weaker mages are more cost-efficient researchers. So once you have multiple forts, recruit cheap mages from most of them and battle mages from a few. Use the money saved by not recruiting lots of super-expensive mages to put up more forts, and eventually your research catches up.