Spellcasting build

[Mad Hawaiian]

I'm new to this series, I made my first person a Spellcaster. I'm wondering if there is a build guideline? Currently 3 STR, 3 Qickness (2 Ranged combat, 2 Shotguns), 4 Int, 6 Willpower (6 Spellcasting), 4 CHR (Security and Academic), 3 Body.

Is there anything I should be aiming for? Should I just be pumping Willpower and Spellcasting to max? I have allot of AoE spells already, chain ligtning and a mana bomb.

I currently have 12 Karma saved up.