Yeah. White Raven Tactics + poor ruling about allies = broken. Just say WRTactics only applies to an ally, not yourself.
Iron Heart Surge has been ruled (by some) to be able to end
any effect with a duration, not just to remove effects on the initiator. So... goodbye,
anti-magic field.

IMHO, Iron Heart Surge should be ruled to only remove conditions from the initiator, or spells which have targeted the initiator, not spells which have an area including the initiator.
- - -
The only item in the SRD that grants a bonus to Concentration checks is in the Psionics section (one of the Third Eye items). It takes up an unpopular slot and gives a +10 -- too strong. Just ban that one item.
IMHO: Tiger Claw + Jump check items is
not a problem. You are
supposed to be able to make those checks. The Jump check is
not a huge limiting factor on those maneuvers, and even with a super +30 Jump item, the effects aren't broken. Honestly, Ring slots are worth a lot -- the Ring of Jumping isn't broken. (TC is different from DM, since DM uses Concentration to make saves and set damage. TC merely uses Jump to deal fixed damage.)
Cheers, -- N