Change the torc to proc temporary spell points. The current Torc is sweet like sugar, but honestly it's to sweet and is unbalancing the game. If the torc procced 25 temporary spells points you couldn't sit around refilling your whole bar you'd get a good amount of SP back questing normally, but it wouldn't be so out of control on people who can self heal with their blue bars. It would also allow an epic torc to proc for say 40 spell points giving it a real improvement over the normal torc.
I'd also change the proc on concordant opposition so it does a small heal rather then temporary hit points. This would allow melees to benefit from quick double procs like casters currently can.
Last I'd suggest changing con-op weapons to be an on attack effect so you can't gain a chance to proc from both a weapon and item while shield blocking.