I love monster classes! They encourage new strategies and ways of looking at the game, and the list of them could be seriously expanded. Whether added by another update, DLC, or the special edition building, we need more of them. Here's a few suggestions:
Wraith
Draining Touch: Your attack mana burns monsters (They do physical damage, and it wears off like poison)
Etherial Body: You start with 25% physical resistance
Drained Body: You have no mana regeneration, +2 max mana
40 CP for 1% physical resistance
Golem
Rock Body: You have 50% magic res and 1 DR per level
Rock Fist: You always have the might effect (+30% damage, 3% resist erosion)
Rock Brain: You have -5 max mana
80 CP for 3 DR (Assuming Vamp will change to Lifesteal)
Animated Armor
Iron Armor: You have a refreshing death protection upon leveling
Iron Blade: You have +1 base per level and +20% attack boost
Insubstantial: -3 hp per level
100 CP to a death protection
Feel free to post your thoughts and ideas!