OMG, this list looks monstrous! I think you want too much from the deck. I would recommend following the major maverik's plan than adding new combos into the deck. Griselbrand doesn't belong here, as you cannot reliably fast cheat it into the battlefield as Sneak'n Show or Reanimator do. Also Grisel unlike Elesh Norn doesn't win in the mirror. He doesn't sweep the board, nor can you cast it from your hand. Iona on the other hand may be in the sb if you like it. I'd enjoy sneaking it against high tide :laugh:
I'd recommend leaving 1 loyal, 1 elesh and 3 shamans. Move peacekeeper into sideboard. In the maindeck he's relevant only in sneak'n show-heavy metagame. Lightning greaves is recommended to play with mystics, cause you need to be able to find it. But usually playing mystics slows you down a bit. So it depends on your style of playing. 1-2 Sylvans are always recommended.
Also I'd suggest throwing away caverns and adding the 4th wasteland. If you feel problems with dredge, add 3rd surgical and/or faerie macabre in the board. General strategy is to find as soon as possible scavenging ooze and gaddock teeg or elesh norn in the first game. You can slow them down by fetching a dryad arbor to block some zombies to remove the bridges. Also use counters from jitte to kill your own creatures for removing bridges when necessary. But prey not to be killed during first 2-3 turns. After sb it's usually easy if you keep hand with some g/y hate.