@ that challenge...thingy. I got that you can manifest it twinned AND split ray'd (it is effect:ray), with overchannel), shoot your psicrystal with maximized energy missle to boost the damage soak, then shoot off 8 rays as a standard action for 69 damage apiece. It's pretty good, and the little thing that makes it cool is that once energy's absorbed, it doesn't go away. I'm not sure if twin works because it might fall under stacking similar magical effects overlap, but that's still 276 damage per round as a standard action that takes no resources of yours.
Now, if you could get, say, something that makes it explode at the end of the ray, I'm sure I saw some sort of meta-something feat somewhere... that'd rule.