Sounds like you're playing it incorrectly; your goal is to get a buff, heavily-damaged Doll and then TU (preferably multiple times) it for direct damage.
I do not understand why ???
1. Play Supernovas, Pendulums/Towers, and Precognitions until you have a Voodoo Doll, Gravity Force, a few Basilisk Bloods, and a few Twin Universes in your hand.
2. Play the Voodoo Doll, then use your Basilisk Bloods and Gravity Force on it all on the same turn.
3. Wait until your Doll is either almost dead, or you can do enough damage from using TU on your own Doll.
4. TU that same Doll over and over again until you do a total of at least 200 damage.
5. ??
?
6. Profit!