So I was messing around and started a Fury and normal Wizard.
It has access to waaaaay more nuking spells per encounter!! Nearly twice as much, and this makes low level (1- life considerably easier. Such a huge selection of spells to cast, and not needing to wait until late game! Just throwing out nukes nonstop. Considerably more satisfying than a single class caster for at least the first 10 levels or so.
Now I get the downside, it will likely drop off compared to a single class caster as the spells will be 2-3 lower PL and I will always be 2 ranks behind (No insane t9 spells). But it's just way more fun having SOOO many more nuking spells for most of the game!
Feels like BG2 again!