Yes it's good, with grenadier too it's pretty insane.
Though in your case it's probably the least OP thing in your whole build 
The thing is, LTI is a force-multiplier.
Locus of Control once every 15 turns is strong, but CAN be beaten by attacking during the cooldown.
Locus of Control once every 7-8 turns is on a whole different level as for the first 3-4 turns the CC from the first LoC is still in play, and then psion simply walls off (with force-field or whatever) for another 4 turns.
Psi Booster once every 3 turns is +33 psi per turn. Once every two turns it's now +50 psi per turn.
Etc,etc.