Regarding the Inciter, make sure you arrange your DPS with some distance to each other.

I usually run with 3 Shammies, Prot Pally and a healing class.

I place two of my shammies on each of those mounts at the far back and one in that small alcove to the right side of the platform.

When he starts mindcontrolling the party, your toons first need to get into melee range before they cause havoc. Having these spread apart buys you some time and minimize the damage from the first 'chaos',

I usually tank him in the middle and make sure that everyone is in range and then go all dps. After the first chaos realign your toons quickly, burn him down and hope for the best.

The fight is annyoing as hell and I stopped counting how often the Inciter bugged out by regaining all his health. *sigh*