I love how throwing a few stones and… ehm... blowing a few winds… can save new end-game raids.

Seriously though; saying end-game raids are designed for tank and healer dps just means you have no clue how gearing scales these encounters, for everyone. Everything changes if you and your party are well or over-geared for the content you are playing... max-dps away then. If this is not the case, focus on keeping the real dps dps-ing, tonks tonking. Any downtime is 100x worse than you missing a low-geared wind or stone tick... but sure, tickle the boss with your stone and wind if you like.