I finally did the right thing by the Evil Sovereign and built it up for mtbing instead of commuting.
Frame: Evil Sovereign, small size.
Fork: Fox Float 32 150 RLC.
Wheels: Shimano XT.
Brakes: Shimano XT.
Cranks: Race Face Deus XC 22/32/44 170mm length.
Pedals: Time Z something.
Chain: SRAM.
Cassette: SRAM 990 11-34.
Rear Derailleur: SRAM X9.
Front Derailleur: Shimano XTR.
Tyres: Maxxis Ardent 2.25" LUST front, Maxxis Crossmark 2.1" UST rear.
Stem: Funn BoB white/yellow
Handlebars: Funn BoB white/yellow.
Grips: Oury lock-ons.
Shifters: SRAM X0.
Seat Post: Funn BoB white/yellow.
Seat: SDG Bel Air.
Headset: FSA Orbit II?.
A few things to fine tune but otherwise it's looking good. New bars are definitely on the cards because I cut them down for commuting!