*Are you sure they're actually going to be USEFUL? That depends mostly on their actual power or levels. As Velvetine said, power levels can be drastically different. It's hard to tell what a PSION can do exactly, but considering they use Psionics it's a reasonable assumption to make that they can find what is hidden-IE, them. Their overly-generic attacks may be too generic to even do damage at times as well! Being Generic has its upsides...And downsides.*

*Are you sure? You need at least one other person agreeing with you. And no, this means actual other players of this game.*