what im doing wrong in key

[tawdry karma]

https://www.warcraftlogs.com/reports/3wnGkf9A2vbX8P7t?fight=17&type=damage-done this is one of log i had recently and i feel i can do more dmg but i m not sure what im doing wrong i think i listen to roation according the guide but still not manage to do much dmg any one can help me and tell what im doing wrong

[visual umbra]

I'll peruse the log and post as I go. First issue: opener. Fix that.

Second pull you cast explosive shot right off the bat with no LnL proc, and again a little while later. It's a low priority filler, you had higher priority things to cast first.
Second trueshot your first global was volley, it should be an aimed. Cast the volley beforehand. You also explosive shotted in this trueshot when you had better things to do.
On second boss, you multishotted at the start of the fight, then never again. Remember - when sentinel spec, you should be multishotting 2 targets, and you could have done this whenever the bosses were stacked.

Multiple times during swapface you casted aimed shot one after the other without using the precise shots inbetween.

You did it again on the Bubbles mob underground.

And again on the last boss, repeatedly.

Always use precise shots UNLESS you have the moving target buff AND spotter's mark on your target.

[tawdry karma]

tyvm i will work on these things