It has an inbuilt stacker that doesn't use Party's activation -quite a few guys are 13+ tabling with it. There is two stack plans, three stacks with an extra slot for waitlist, I am back tables and busted sng's - the other plan is one stack with three 'big hand' slots. Hotkey moves them to the slot and they rejoin the stack automatically at the completion of the big hand. The fourth stack is the same as the other plan and all of that is automated - ie, if you bust from a sng or sit out, the table automatically goes to slot 4. When you have big hands in the slots, the main stack keeps bring active tables to the top so that you can fold while making big decisions.
It had some improvements since I last updated the free trial, I'll put the latest one up in 15 minutes so you can try it on play money.
Edit - I checked and the trial
is the latest one after all so you can give it a try - 2 real tables or any amount of play tables.