Just some observations from playing my L36 stone/stone tanker over the weekend Im not a number cruncher, so some of this may be a bit gimpy.
Seems to still work fine following the respec; I spend most of my time tanking in granite, and didnt notice a drop-off in performance slotting 3 def and 3 res SO enhancements and adding 3-slotted stone skin. With swift three-slotted, moving in granite was still OK, and with rooted teleport seemed to work well.
I kept hasten in the build, primarily because super speed is my preferred travel power, but also as a way to increase my DPS when needed. Stone/Stone is a real end hog, so having it permanent would be a bit pointless, but being able to crank it up a notch is handy from time to time.
Mistakes I made in the respec I took TP ally rather that TP foe, which is going to be a hindrance for PvP; I dont really need all three, so thats another respec mission to do. I added maneuvers to give me a boost to my def, but its really not helping that much with a respec Id probably lose this too.
So, at the moment my build stands as follows: -
Primary Rock Armour, Stone Skin, Earths Embrace, Mud Pots, Rooted, Granite Armour
Secondary: Stone Fist, Stone Mallet, Taunt, Large Mallet, Tremor
Fitness: Swift, Heath, Stamina
Leadership: Maneuvers
Speed: Hasten, Super Speed
Teleportation: Teleport Ally, Teleport Self
Ive got 5 powers left to take; I will be taking both minerals and seismic smash, but have no idea what else would be a good idea and would like to hear from other stone tanks. Also, slotting for mud pots Ive currently got 3 dam / 1 end red but Im thinking of dropping in a taunt enhancer instead of damage
As for the tanking itself, I primarily faced Nemesis and Devoured Earth on teams of 4-5. The teams consisted of tankers, scrappers and blasters only for the most part; I was able to hold aggro on L41 and L43 Nemesis mobs without too much difficulty, although damaging them was another matter. I havent had the need to turn on Earths Embrace all weekend. I also had my first experience with sappers, who will be the death of me by the looks of things. I havent gone against psi yet either.