In my group, me and my tank always stack for resin on the left side of the boss within melee range. As it's already expected, what I do is hit my add once as it spawns and move to where we'll stack, stil hiting the boss, só I wont kill my add too soon. As soon the resin AoE goes off, I'll just move to the laser, plenty of time to kill the add. Everything is just fast and clean, and I stil have one flank and the boss rear to hit positionals. The only exception is when the laser spawn right where we usually stack. In that case, we stack on the right side of the boss for resin.