I really dig your intention to focus on Progenitus as the win-con. Personally I would swap out some of the "goodstuff" and tune the list more toward getting Prog out early. If you play a dork T1, a 3-cmc rock that can generate 2 mana on later turns e.g. Coalition Relic/Component Pouch/the "__ of Ramos" rocks on T2, and follow those up with a couple more ramp pieces that create 2+ mana, you can consistently get Prog out on turn 5. Then T6 could be dedicated to giving him double strike/double power and +1 to his power so you can start taking out opponents. You also wouldn't need removal with a strategy like this since you can just remove the player that controls the worst threats.

Personally I would make these swaps:

Pyrohemia -> Utopia Sprawl (you'd ideally run fetch lands so that this will always have a target, e.g. Marsh Flats into Temple Garden)
Squall line -> Deathrite Shaman (also wants fetches to be effective)
Greenseeker -> Avacyn's Pilgrim
Vraska, Relic Seeker -> Elves of Deep Shadow
Sylvan Ranger -> Sakura-Tribe Scout
Curse of the Swine -> Skyshroud Ranger
Hull Breach -> Hunting Wilds (can find nonbasic forests like Stomping Ground)
Magus of the Mirror -> Skyshroud Claim
Pongify -> Dawn's Reflection
Rapid Hybridization -> Berserkers' Onslaught
Chaos Warp -> Firemind Vessel
Generous Gift -> Relic of Sauron
Path to Exile -> Prismatic Geoscope
Blasphemous Edict -> Timeless Lotus