I think they'd be better off if they sacked Conte and brought back Poch. At least with the Argentinian you have some semblance of a gurantee that he won't feck off if he's not going to get his favorite toys after 1 window.
Rejoining a club rarely work out. Levy did Poch dirty before. I doubt Poch would be thrilled at the possibility to come back and relive Levy stingy transfer policy. Poch fall out toward the end of his time there previously had much to do with transfer policy. Poch right now didn't improve his reputation, so he has more to lose coming back and compromise with Levy now, than working his way up at another club.
Beside our job, RM link; Newcastle job may become available if Eddie Howes can't put them on track to move higher on the table next season. Newcastle unlikely to be able to attract the big egoists right away, nor demanding instant trophies. So Newcastle may be a better choice for Poch if the timing is right.
Spurs is in really bad position right now. They would have to go all the way with Conte demand, or they have to look at manager from lower tier than current Poch. No manager with a point to prove (including Poch), would risk their reputation with Spurs now. Either way, they would need a big transfer to improve their team.