As a DD/Healer, my job would go smoother if all the tanks had at least one step of their AoE combos as a cone AoE because then they wouldn't park in the middle of a pack with enemies spread out on four sides of them. Cones encourage a tank to run out to the side of the pack, which gathers them tighter than if the tank just stands in the middle spamming circles. If the mobs aren't gathered tightly enough, I can't hit them all. I can make certain adjustments to hit more targets but that's only manageable to a point. Spells with a 5y radius don't really hit that large an area.