Low Level Nukes.

[Zelbor]

You probably won't use any of your non-undead nukes very often, but as others have said it's super important to keep your Evocation skill up for stuns (especially vs. casters) and undead nukes. I appreciate your concern about "investing in" spells, but level 1 and 5 spells cost basically nothing anyway; it's at 9 that they become expensive for a non-twinked character. Also, the level 1 nuke is handy for pulling mobs to you rather than having to run up and melee/body aggro everything.