Anyway, did some thinking, here's kinda what I came up with. Basic idea is to get a "land of each basic land type" through either Prismatic Omen, ideally, or Nylea's Presence if need be. Scuttlemutt gives us "a creature of each color" and also gives us some mana fixing. Vampire Hexmage + Lost Auramancers give us a way to cheat out Coalition Victory early, although there is enough fixing / ramp that you can hard cast it if need be. Plus, a Glittering Wish SB package and Pact of Negation backup.
I kinda like Sliver Hivelord as the 5 colour creature win con. Its indestructable... plus slivers have lots of built in advantages with mana fixing gemhide and manaweft.
I would also run supply // demand to go find it. You are remarkably short of ways to get your multicolored cards.
Making this shift means you can remove fist of suns (or keep it), but also run jodah, archmage eternal as a tutor target or as a glittering wish target. Additionally, jodah is RWU, if it matters for your colors.
Anyway, did some thinking, here's kinda what I came up with. Basic idea is to get a "land of each basic land type" through either Prismatic Omen, ideally, or Nylea's Presence if need be. Scuttlemutt gives us "a creature of each color" and also gives us some mana fixing. Vampire Hexmage + Lost Auramancers give us a way to cheat out Coalition Victory early, although there is enough fixing / ramp that you can hard cast it if need be. Plus, a Glittering Wish SB package and Pact of Negation backup.
4 Birds of Paradise
4 Bloom Tender
3 Vampire Hexmage
3 Lost Auramancer
4 Scuttlemutt
2 Transguild Courier
2 Nylea's Presence
1 Coalition Victory
4 Manamorphose
3 Pact of Negation
4 Glittering Wish
1 Fist of Suns
1 Malestrom Pulse
1 Gaddock Teeg
1 Qasali Pridemage
1 Vexing Susher
1 Coalition Victory
1 Reaper King
1 Maelstrom Angel
1 Zealous Persecution
4 Leyline of Sanctity
2 Creeping Corrosion
1 Spellskite
1 Torpor Orb
Fish U
Jund BRG
KnightFall WURGC
Pioneer:UR Pheonix
Modern:U Mono U Tron
EDH
GB Glissa, the traitor: Army of Cans
UW Dragonlord Ojutai: Dragonlord NOjutai
UWGDerevi, Empyrial Tactician "you cannot fight the storm"
R Zirilan of the claw. The solution to every problem is dragons
UB Etrata, the Silencer Cloning assassination
Peasant cube: Cards I own
MTGO/MTGA: Tyclone
My Primers ~ GWx Vizier Company ~ Knightfall ~ RG Eldrazi ~ Green's Sun's Zenith
More Brews ~ Modern Four Horsemen ~ Gitrog Dredge
Making this shift means you can remove fist of suns (or keep it), but also run jodah, archmage eternal as a tutor target or as a glittering wish target. Additionally, jodah is RWU, if it matters for your colors.
Credit to DolZero for this awesome sig!