Get better DPS.
When our tanks are kiting they are actually kiting; They aren't in melee range. Tank damage on Garalon will always be low, primarily because of his low attack speed and relatively low damage vengeance doesn't stack up. That's primarily the reason why tanks should kite. Having them out of melee range is not as big a DPS loss as having a Proper DPS out of the blue circles.
There is a spot where the Front legs blue circles overlap the frontal cone area. iI you imagine a direct line between the center of the blue circles at the front, where hat line crosses the blue circles is where a tank should be when he's not kiting in order to deeps the legs. if he is kiting fuck deepsing the legs just stay at max rang inside the cones and try not to drop the shit all over the place.
YOu do not need 5 people to kite (unless your healing really sucks ass) 4 people, 20 stacks each will do. We go tank>ranged>tank Ranged. that should leave you with 4 deeps with 100% boss uptime. some peeps have 3 kiters swapping off at 27 stacks.