can also be used when RDM tanking to convert safely from HP to MP or when you in red health to convert from MP to HP without losing all your MP which is used to keep hate when tanking.
Alot of people forget that you can convert MP into HP as well with convert. I have seen someone kiting a monster with 1 HP use convert to save their *** but lost all their MP in the process. This weapon can give back 50% of either HP or MP.
Still, the weapon seems like a very expensive macro-in peice.