There are these rare times where you have all buffs up and CL/SS are on cd and you are low on maelstrom. It happens and I always wondered what you should do in these cases. Well wordup answered this exact question on reddit. His answer was: "you wait!".
This means you don't use LL or even FB if you are low on maelstrom and your CL/BF/SS are on cd with FT/FB up already and not close to refresh stage. Waiting for 2-3 secs seems to be better than wasting maelstrom on LL.
PS. If any1 is interested about his opener he said its - BF>FB>FS>CL>FT>DW+SS and then you keep going with the rotation. He also said that you should try and have at least regular SS when you are about to use DW. Dont wait for SS procs to use DW. Hope this helped