We have 1 tank grab Asclepius (Big snake) and another tank grab the 2 small snakes. DPS burn the 2 small snakes down to about 70% so the LB2 will finish them. 10 seconds before the second dive bomb phase, the tank holding the 2 smaller snakes breaks off and kites the arena while the other 7 people pocket dance the dive bombs with Asclepius. This allows the kiting tank to be in position as soon as the other 2 small snakes spawn allowing a faster LB.
Defensive cool-downs should be saved for when all snakes are brought together for LB, as there is a ton of spike damage happening with debuff stacks flying around. Ideally only the tank kiting the small snakes will get the debuff. If any land on the tank holding Asclepius, you can run into problems.
This point in the fight is probably the most healer intense as well, so you might want to look at your healers as well as tanks.