Man, as a 52 beastlord, I managed to kill one of those spiny turtles in Natimbi. KEI, Virtue and my self buffs, these guys took a hefty bite out of my behind. If it wasn't for the some 1600 in heals from some kindly Necro I would've probably had to do a lengthy CR. Sha's Lethargy wouldn't land, but Listless Power, Venom of the Snake, and Frost Shard did. Was hitting me for about 200 each round plus would stomp on me for another 75. Nasty thing. Couldn't even loot because the sucker ran next to another turtle and my pet got wiped out (I had to chain heal my pet while it was tanking the first one just to keep up). Next time I go in there it's either at level 60+ or with a good group.