Another possible life would be a CC Wizard as the end game seems a little low on healers and crowd control?
Not sure exactly where to place everything in that build.
Elf would be fine, or Drow, or Warforged.
18 Wizard / 2 Rogue/Monk with insightful reflexes or Pure Wizard.
Spell Focus Conjuration, Enchantment, Necromancy?
Archmage with Conjuration Focus for almost free webs or is that not a good choice?
Add in Enchantment Focus for Disco balls and the like.
I know Fawn's web in the Druid quest where very strong unless someone blew them up with fireballs.