If you are talking the DPS side, the power regeneration is not based on your weapon choice. After you first hit Pyschic Resonance and you get that purple dandelion on your head, your AM is up. After that, hit Shock/Flames/Bolt/Mass Lev(or Mass Terror), and repeat only those 4 powers. There is NO need to hit Resonance again UNLESS you lost the AM (the purple dandelion). At later CRs it's fine, but for now you don't have enough power to keep hitting it. Also, there is no self POT in DPS role.