Which one, in your opinion, is the most fun?

I am honestly so torn about this, I like being a pure mage because you have to strategize and plan things out and decide which branches of magic to go into and such, yet spellsword can use both and do those awesome killcams. I can't decide which to be, I would hate to be a spellsword and not have enough points invested to either of the branches and not be really good at anything. I'm not sure, I just got the crimson tide mod and maybe its making me want to stab more people who knows
. When I start my new game I just want to have tons of fun, yet be challenged.

(off topic: speaking of challenged, does anyone know what would happen if I got the Apocalypse spells and better magic? Would it be OP? I REALLY do not want to be OP but I want new interesting spells AND spells that level up with me so I do not have to spam enemies. Thanks if you can help )