Just in case anyone is interested, I ran R/B - turns out that U and U/B were being drafted down from me, so I had to switch my UB build out fairly early as blue just dried up.
I won't post my entire draft list, but here's what I ran:
1x Doom blade
1x Lightning Bolt
1x Bog Raiders
2x Chandra's Outrage
1x Assassinate
1x Prodigal Pyromancer
1x Black Knight
2x Liliana's spectre
2x Stabbing Pain
1x Nether Horror
1x Combust
1x Chandra's Spitfire
3x Vulshok Berserker
1x Goblin Tunneler
1x Magma Phoenix
1x Child of Night
2x Volcanic Strength (should have swapped out for 2xQuag sickness in my sideboard)
1x Fireball
8x mountain, 7x swamp, 1x terramorphic expanse.
record: 6-0-0