Im not really sure what your trying to say in your question. But i will take a guess that your worried about the fact you have to split your potential in order to use multiple powers in one turn. First off their is no limit to how you split your potential, for instance, say you had 10 potential (just a low number example not likely any character would have that low) The first power you could put in 1 potential and the second 9.
Also its unlikely that a low level Psychic would do multiple high powered attacks/effects. And as for the higher level abilities such as Area and imbue they are only at an activation of 140. And all Area and Imbue powers are maintainable, so it really shouldn't be that hard to use those, just maintain them instead of using them the same turn as the other desired effect. All else fails, could just invest some pp in strengthening your potential for your desired Area effect, so that Area effect in its self would have its very own potential to fall back on so that you wouldn't have to divide your potential up as much if you wanted to use both at the same time instead of maintaining them. This method would work for all powers. Just very costly.
If you need more help let me know. And if this wasn't very helpful, Im sorry I can only say what I know, and how I understand the rules of the game. Good luck in your various game sessions. I'm currently getting ready to finish up my first full campaign. It shall be spectacular, An organization that my party made vs Thee Inquisition in an all out war. I know it sounds very unlikely that the party will when, but believe me, they've done a good job up till now in growing their strengths and numbers, but not pissing off various powers. Of course this won't be easy and they know that, but they seriously are trying to crush the Inquisition. And weither or not they accomplish their goals, it does not matter this game will be over, cause either they win, or they die, making a good ending point for a start of new history for my campaign.