It dies horribly to artifact hate, though.
A potential sequence could be:
T1: Land, Vial
T2: Land, Mindcrank
T3: Land, vial in Guildmage, keep mana open just in case
anything happens or provoke action with a free spell like
Gut Shot
The main question is the rest of the shell. Brainstorm and counters should be good, vialed in Snapcasters (or Baleful Strix) could be interesting as well.
Actually, while thinking about it - what about a B/U Storm shell with Rituals and stuff +
Brain Freeze? You would need 6-7 storm (depending on fetchland use) + one activation to go lethal. Mindcrank doesn't sound too hot with Abrupt Decay around. You could even include
Nivmagus Elemental.
Edit: Quick question: Does the Priest trigger once or multiple times if the gets e.g. blocked by three creatures without first strike?