I havent downed heroic yet boxing. The difference to me is huge, I can mess up on normal badly and get past it but heroic if I screw up or miss a purge/dispell on the summoned to get rid of the heal as an example thiings tend to go down hill quick.

Have had quite a few attempts at Heroic and if I can survive the initial onslaught when I charge my tank in to pull the champions then I seem to do alright in the jousting phase. Phase 2 of the BK smashes me still. My tank well outgears my other toons though so I guess its about getting more gear and more practice.