Amnesia (this can be given without being broken)
Plague (Same as above)
Inhibit (Gives same effect as "Inhibit TP", reduces an Enemies TP gain)
Reflect (Maybe this should go to PLD as well, It could not be as powerful as past titles.. Would be hard to balance)
Stop (Removes any "Regain", "Regen" or "Refresh" Effect the Enemy has for a period of time)
I think stop would help in a lot of fights, but could be balanced to not be overpowered. Imagine stopping the Turtle in KSNM99's regen for ~20 seconds or so? or a Mobs Regain effect for a period of time.
Could do wonders for HNM-scene RDMs.