[Xuincherguixe]

As much fun as wizards can be, if your party is lacking a divine type it might be better to go Druid.

While a wizard can certainly end encounters if done right, if you're just shy of right, the team could end up getting roasted.

Druids get a bit of destruction type spells. And while not nearly as fun as breathing deadly gases and exploding peoples heads, it sounds like you the group needs good support magic.