With the right build and playstyle you'll dominate any other class, but getting up to that level takes a lot of trial-and-error. - Trauma

What do psionicists do, and why would you play one? It's hard to describe exactly what a psi is, especially compared to WoW, because there is no copy. The closest thing I can find is: CC like a frost mage with spells that look like a mix of arcane mage + shadow priest. Choke reminds me of mind flay. ;)
How come we're one of the most wanted classes endgame? Well every heroic group needs a player to CC - psi's really shine in this. Mages are another class that can CC, but we bring more utility. Our CC chains take longer to set up, but we have a melee buff (Rapid Metabolism) as well as a caster buff (Disciplined Mind) - not to mention if specced right we can also give our mana to other users. If we pick up the ruby talent Fear of Failure and spam shock, our whole group gets up to a 9% damage boost on a target. We're just an all around utility/support class that provides CC.
Then why are there so few of us? It might be because the psi class takes awhile to learn, or because we are darn squishy, or because it takes too long for us to set up to kill anything. Most fights start out with casting mental link + mental twin - which might feel a bit unnecessary to players who just want to run in and start smashing things.
In pvp we are alright solo, but we shine the most in group pvp. Others can watch our backs while we orchestrate control from a distance - we can disarm players, knock them down, disable 1-2 players completely from a fight, pull them into a group to be aoe'd, etc.
Read on for input from 2 level 40 psi's who really enjoy their class.


