I'm sure that your Sorcerer is very good at killing enemies, but that's not what arcane casters are for. Your job is to buff the melee characters in the quest. I'm okay with you using some of your spell points to blow up monsters, as long as you're passing out Blur, Greater Heroism, all elemental resists, Haste, Rage and every other buff that will benefit the melee characters. Extended.
The nice thing about having a Sorcerer is that you can have fun with the rest of your SP after you pass out all of those buffs because you have so many SP.