If you're having trouble with jasper chains you may want to consider sticking with LFR until you get more geared up. IMO, spirit kings are muhc easier than any of the other bosses, you don't even have to break the chains, I'd recommend just staying with the chained person the whole fight to be honest if you're having trouble, as I believe once he throws out 3 sets of chains, there won't be any more for the rest of the fight. The big thing to look out for it to determine if the other person you have chains with is ranged or melee, if it's ranged ranged, no need to break them at all.