Cobra shot has freed up a lot of focus in the survival damage priorities because we rarely if ever need to re-apply serpent sting in a single-target engagement these days. This in turn means that we can occasionally spam a few arcanes. For me, this happens most often right after I've used black arrow, because the only thing coming up that I'll need to spend focus on is explosive. Unfortunately, this means that a couple times now I've had lock and load proc while spamming arcanes and accidentally wasted it on them. I shall simply have to be more careful with arcanes while black arrow is on the boss.