[The Ozzman]

lucky for you i fought Melissan extensively to find out what can do damage to her, and what cant. The only actual spell that I found that does damage is Prismatic Spray, it will do 20 hp worth of damage. Memorize as many as you can. Also just to get them out of the way if you hit those greater air elementals with flame arrow it will take them down to near death. Your Archer will only be able to hit Melissan with +3 arrows ONLY! Or unless you are using the Firetooth, or Tansheron's Bow. +4 Bullets also do damage to her. Dont even bother with arrows of piercing, acid arrows, arrows of biting, she is completely immune to all arrows except arrows +3(including arrows shot by the Gesen Bow, they will not hit her.) As for the rest of your spells you want stuff like the wharding whip, breach, pierce magic and especially SPELL STRIKE. Even spells like Dragon's Breath or Comet, or Bigby's do ZERO damage to her. So just stick with the stuff that will knock down her defenses. And don't forget your high level abilities, especially critical strike and greater whirwind attack!