We finally nailed it tonight after weeks and weeks of hard work! After 7 minutes and 56 seconds Halion fell! This feeling brings me back to tbc, it was long ago you had to try a boss for so long without getting him down.
I was healing our feral druid MT together with a paladin in the fire realm in the last phase. A shaman was on our DK offtank and we had a priest on debuffed people and raid and helping out on the tanks when possible. There's not really much room to do much else than just spam the tank with everything you've got. In the twilight zone we ran with a paladin, druid and priest as healers. Boy am I glad we got this one down before the patch and the changes! :D