I personally go with both of there alpha assists. I play Zero/Pool/Chun. Deadpools alpha assist hits low and goes nearly full screen really fast its really good for unblockables. Once I feel Zero's about to die I switch over to Deadpool and play keep away. Having some sort of anti-air is important for keep away characters, so Zero's alpha assist does that pretty well. Of course I use lightning legs with Chun since its so good for Zero.

zero shot front, deapool ionno.