An easy infinite (well, PP limited one, though you might be able to get a recharge setup with link and dominant ideal in there) is sharing it with your psicrystal. You use your prepared action to cast synchronicity, it is metamorphized into a nasty form and attacks something. Repeat ad nauseam for one free attack/powerpoint (possibly a little worse, if you need to augment it to get different actions for you and your psicrystal).
With dominant ideal, you can throw in linked whatever you want to your synchronicities, and throw powers around all over the place too.