Ranked Adventurer

It was pointed out there was a bug in frost step that allowed xp to be gained without even casting the spell. Any damage to an enemy was granting xp for the spell. 

I fixed this and add in xp gains for aoe / multi enemy hitting spells. Initially i disabled this to avoid cheesing the levels but i now see that people playing the game normally will see aoe abilities kill all the enemies but only gain xp for one enemy which slows progress. Initially this was in place to avoid mob spawn farms to boost your rank too fast.