Set heals to main tank. Big bynns dps is minimal, but spikey.
Raid dps to abouit 90% of bynn the the WHOLE raid minus MT need to jump and burn the crystals. There are a few ways to do it. 1. Start on one crystal and work your way around. 2. Assign a group or so to each crystal. Have them kill them as they spawn so less running around. 3. a combo of that.... ie casters floating, melee on set crystals. On a timer the crystals will depop. I Belive its 1 minute on the first set. Then a group gets swallowed into bynns belly. For each crystal they kill it buys you 10 or so more seconds on the crystals that spawn outside. With a max of around 1 min on the outside crystals. 2 mezable / charmable rats also spawn in bynns belly, either have a tank ot or enc mez them. 2nd set of crystals happens around 78% or so. I'd reccomend using some discs on the crystals since this is one of the worst ae. 3rd set around 66%, this sets gimp, 4ths set around 54% and final around 42%. We disc on sets 2/4. After the last set of crystals its just dps bynn down. Youll get a mana drain ae, just rc it away.
at 15% or so bynn becomes inactive and 3 golems spawn. Shiver / firecite do not snare, the other does, kill them, after they die bynn is active, just dps him dead for the win.
Group set up for this is important.