I'd make these cuts-Magus of the Scroll (unreliable, slow, gives up information etc)-Shrieking Affliction (only include if you make card discard a focus)-Crackling Perimeter (only have 3 gates, probably can add something else)-Gutter Skulk (most people have > 2/2 creatures it does nothing, there are better zombies)-Highborn Ghoul (lots of people play black so intimidate isn't that helpful)-Goblin Rimerunner (making one creature not able to block is a weak effect)-Hired Torturer (there are better repeatable life loss effects)-Accursed Spirit (intimidate is somewhat useful but not as much in our playgroup)-Curse of Thirst (only playable if you have a lot of curses)-Lava Axe (5 damage is not a lot in EDH, Fireball would be better for example)-Phylacetry Lich (not enough artifacts to include)
Suggestions:- You want to have creatures to sacrifice to Tymaret so you need to generate more than 1 creature/card.- Need to add some board wipes- Need to add some card draw- Need some bigger creatures- Need some more combos with zombies such as Zombie Master