If i see a choker and there is a posiblity ill do a building wall run push....
It consist of either running on, or running with(something like price of persia) a wall or building, when i get on top or get a certain altitude i simply turn and push...
Generally if your not dealing with a vetran few will be able to anticipate that move and you will be able knock em down.
As for pullers, most pullers are...well noobs not as in the insulting way but really newbies....the pattren is generally...2 pull attemps and then a mash..
So simply block their pull, and then if they mash push em, or if they are too close, simply CB them, and at the end of their combo do what you do best