I know what Chirada does before casting downburst but my point was that someone not knowing that particular detail will run into Slipstream. I know how it's done, just saying that some people don't so triangle method or whatever won't save them from that.
Also, teleport is triggered by 50% HP on Chirada after sufficient time so if you see your DPS is slow, expect double WW to come before teleport. You'll have 20 seconds between Spiny put second stacks on you and applying another stack so even though it seems close, I have never seen it hit 3 stacks on the MT when I do this method. The teleport is triggered by time, not Garuda's HP so even with slower DPS, it would still not be an issue.