Obviously in a recorded viddeo you will show the most epic moment,
sad to say that 80% of them are hardly tied to luck for BLMs
(not a critique about your playstile, you areusing correctly those opportunities)
a lot of kills involve a Critted attack (or even 2 Critted Fire 4, that hit for 10.000 HP,
or 1 or 2 istant Thunder proc (I don't count when Sharpcast is used)

Anyway tell me if I feel the same, I play BLM too in FL and I have some trouble to get kills
until I'm not in Battle High and if I don't act like "oh I have a Fire 3 proc, let's wait to steal a kill xD",
after the Battle High/Fever you just become a killing machine with CrowdControl too.
.