AP pots take top priority, in my opinion, since you can sustain a lot more runs to get other stuff with that. Besides, they come relatively cheaper than the other stuff.
Other than that, everything else in your priority list should suffice for you during this advent event. It will change as you progress, but perhaps you could ask again at a later date (well, 2 weeks from now to be exact) so you don't get too confused with priorities.