Seconding Sporeegg, a druid is definitely what you need if you cant go wizard. Why bother taking on 53 opponents at one time (slightly staggered) when you can toss out a few battlefield control spells and reduce that number by 3/4 and delay their entry to the area. Plus druid gives an animal companion to help out with soaking/dealing damage. Wild shape is especially fun outdoors because you can just change into a bird, flay to max spell range, and rain spells down out of reach of damage.