[Antagonist]

There's a vid of a Mage AoE'ing spiders. It was alot of them too. o_O

EDIT: I tried to find that vid, and I couldn't find it. ._.

I'm pretty sure that by the time your AoE and END are decent enough to mob spiders, they'll only be half-decent for EXP.

Try an END mage and AoE mobs in Collapsed Prison.