I use repelling shot to place stardusts. As we are often running with a non-static member or 2 so it's easier for me to stand at melee range and completely avoid stacking any meteor streams.
T7 and 8 you can use repelling and flaming arrow at will (excluding jumping into a mechanic obviously). If you are new to a fight then obviously hold off, but once you get comfortable its easy enough to keep everything on cool down and not cause any issues.