Get as much curse out as possible, and attack with little creatures. Try to get as many shamblers out as possible w/ soul steal. Pillar of Fatigue + Eager Scryer best for late game just for extra card advantage. The Pillar can make it hard to set off curse without shamblers or baleful witches. Probably will want to add a third baleful witch. Rattle Hymn can be good to draw the Halls even if opponant doesn't have any lingering out. Protip: rattle hymn can draw from the discard pile.
Note: only one copy of Halls of Oum Lasa because I only have one copy :/