Simple: Hard mulligan for Commencement, but you can keep Lay on Hands in the mulligan to dig for Commencement if you don't have a Commencement. Lay on Hands + Libram of Hope is a keep in the mulligan, too. Also keep Libram of Hope with a Commencement in the mulligan.
Commencement pulls Auctioneer, heal up as you draw cards. Don't over damage yourself. Lightforged Blessing heals a ton. Be careful not to play into Brawls, etc... hold some plays back for post-clears. You can always use a dude to buff, too. Anyway, I'm not sure if this is optimized. I just threw it together and have won all but one game--when I got no card draw and no Commencement or Libram of Hope over the first 4 turns.
The weapon is in there for a fallback plan, but might could be swapped for Holy Wrath or something. Good luck!