[whswhs]

That's a matter of how YOU conceive the abilities. If you think that your character can only use one at a time, because they're all drawing on the same brain centers or attention focus or whatever, then design them as AAs. It's not dictated by the rules; the mechanics can represent different concepts.

Note, by the way, that you CAN have an AA pool with two abilities active. Buy the most expensive two at full cost and then the others at one-fifth cost.