Friend, there are some cards in the deck that do not fit into the deck's strategy. Nath and Stronghold Assassin do not seem to provide a lot of value without some additional support. Nath can make tokens but without additional discard, it is really slow. Stronghold assassin is also really slow. You can probably cut most of the sac outlets and put in goblin bombardment and viscera seer (these are cheap and provide infinite value). Abhorrent Overlord, Ant Queen, Artifact Mutation, Avenger of Zendikar, Caller of the Claw, Catacomb Sifter, Chancellor of the Forge, Daretti, Ingenious Iconoclast, Fresh Meat, Deranged Hermit and Dragonlair Spider are really good token producers to consider.

Hey Peve, you have two copies of Parallel Lives in the Main Deck. I think this is a solid start for Prosh but  there are some cards that could be improved.