The only sweep I can get to work consistently is buck sweep out of twin te slot wk
I think I've had a similar experience. The sweep can work on occasion in other formations, but I find my receivers don't often enough stay with their blocks. If you run out of the twin TE slot weak formation, the WRs (and CBs) are on the opposite side of the formation if the defense is in man coverage. You can end up with some good runs like this, but it is more difficult if the defense is in zone.