Actually, it depends on your gear and play style. Unless you have arcane ring and new amulet and imbued set you are gonna get 1 hit by rogues. This is a fact that you will have to face someday. Singe may help you over come that, but mages are still the squishiest class of the 3. If you like to play aggressively, go for sam. The panic and crit goes right with your play style.