Arachnomancer (DoTU)

[J-H]

Has anyone ever actually built a character with this? It looks like it goes best with some sort of 3/4 BAB gishy-ish caster.
The capstone (gargantuan spider) gives STR +12, 15' reach, a pretty potent poison, and either limited web-throwing (meh at level 13) or a reasonable land speed (40') plus climbing ability. Dex is likely to be a wash for any drow entrant into the class.
The -4 to-hit and AC from size hurts.
It seems hard to optimize a single melee attack per round

[Troacctid]

You really want to be using the Vulkoori scorpion variant of the class if possible, since it has full progression (and scorpion forms are more powerful than spider forms). I mean, unless you really want the Spider domain.

I don't think it's for a gishy character necessarily. Any caster can benefit from having tremorsense and a beefy bug form.