New to the mods - Spell selection help

[Luis Antonio]

I've started playing SoA with ascencion, no big deal.

But I'm kinda stuck on the Five, I'm sure that's all bout my spellcasting ways, cause my fighters (specially my barbarian) are really a mass destruction troupe. This is my party:

Iridur (Barbarian, lvl 27, dual wielding Angurvadal & FoA)
Sarevok (Two Handed +3)
Anomen (hammer of thunderbolts)
Jaheira (Scimitar +3)
Jan Jansen (self launcher + spells)
Aerie (Sling of everard + spells)

Any ideas for a efficient spellcasting sys?