Here's what I try to do on Garuda (note that these are MNK specificthings) :)
- As stated, time Rockbreaker+Howling fist on the plumes (it is important you get howling fist when the plumes are next to garuda, because the cooldown is exact for the next spawn)
- Save Shoulder tackle for emergencies to keep greased lightining up (specially to move from plumes to garuda)
- Keep your stance rotating on the plumes, use Rockbreaker if enough aligned plumes
- If red add spawns close, I always try to DoT it before the green reaches the raid
- Use Blood for Blood (if you have it) in Garuda-only phases
- Save buffs for sisters, and trigger them before they reach the raid (IR, defensive stuff)
- If you dodge any skill, use Haymaker
- Pop Mantra when sisters spawn and reach the raid
- I switch to Fists of Earth when Reckoning comes, I don't know if it helps though
