Our group noticed something interesting for the fight.
When the OT taunts off the MT as soon as tortos starts casting Snapping Bite, neither of them took damage.
We found out by accident because the bites did a lot of damage and I tried to taunt off the other tank as soon as the bite landed to prevent unlucky gibs.
I suspect it may be an unintended behavior due to the nature of the spell (according to its tooltip), Tortos snaps his jaws shut around the target,
Did you guys every notice this during your attempts?
Awesome, informative guide as always Love looking at the ranged POV for this fight.. so much getting knocked around lol