I think it would be possible through Thaumaturgy. If you wanted to buff yourself before going into trouble time is the 1st question. After that just come up with a equation for determining the difficulty something like (stunt cost X 2) +2 so the minimum difficulty you are going to be dealing with for a -1 cost stunt is a 4 shift difficulty, a -2 stunt would be a 6 shift difficulty, and a -3 stunt would be an 8 shift difficulty. If you find that too simple then increase the multiplier.