At lower levels Mind/TA is a really nasty combo. Entangle an mob, then hit them with, by level 6, for your 3 attacks, mez, dominate, leviate, for double damage. Since, entangling arrow recharges so quickly I can pretty much apply it to every mob to get the damage bonus.
On a clockwork mission, I four shot a orange lt. I could easily one shot even minions, after entangle, so you could call it two shots. Though entangle costs almost no end and recharges in a few seconds, I could machine gun the power.
A fight would go something like this, 2 even minions, entangle one, mez the other, leviate the first one, dead, dominate the second one, dead.
I have to agree that it's a great controller secondary, but it needs some kind of buff or heal. One ideal would be a ground targeted aoe that either acts like a regen buff, def buff, or status defense. Like a short duration version of the DE buff plants. Otherwise, it's going to be hurting for group utility worst than storm.