Hello friends.
I want to ask you an advice about sub and assasin dps and rotation.
I read more guides,watched logs and still don't understand why I have bad dps.
For example there are 2 logs from Goroth
Heroic Sub: https://www.warcraftlogs.com/reports/f2nmNPGFtX8wk3vA#fight=1&type=summary&source=41
And 
Mythic Assassin:https://www.warcraftlogs.com/reports/tvnx1Z2BaQGYjF7f#type=summary&source=16&view=analytical&fight=5
Can anyone tell me my mistakes?
Thank you

So i swapped to sub rogue at 7.2.5 and i've read multiple guides but i sim way higher than what i do can anyone tell me what i'm doing wrong?
Using DFA build
Logs: https://www.warcraftlogs.com/reports/dDC4KfzyRhcmawJp#fight=2&type=damage-done&source=9
Armory: https://worldofwarcraft.com/en-us/character/barthilas/toxìc

I've been looking around my logs to look for areas where I can improve my dps. One of the things I've noticed (in game) is that I tend to pop shadow dance too early ( not pooling enough) . However in my logs I also noticed that I'm also capping energy and combo points a lot. What is an acceptable amount of resource waste for sub? Is there anything else I've not noticed in my logs that might help me improve my dps. 
I've been trying to reduce the amount of backstabs I cast during encounters which helped my dps quite a bit ( noticed a lot of the higher parsing sub rogues had less than half my bs casts)
 
https://www.warcraftlogs.com/rankings/character/21629426/latest/

So first, here is my armory: http://us.battle.net/wow/en/character/malganis/Vynrïl/simple
and here is a link to my logs: https://www.warcraftlogs.com/reports/KM7gWRAPc4GrqzCh#type=damage-done
I swapped from assassination to sub about 3-4 weeks ago, so I feel like I know the rotation, I know I  have some CP waste that I can do better on, but I'm looking for more help. I believe I can pull higher numbers if I can get some help solidifying my rotation. Thank you in advance for any help you guys might offer.
Edit: My rogue is Vynril, completely forgot to mention that.
 
PS Here is a link to a full normal clear, not too much change in gear between this one and the link above: https://www.warcraftlogs.com/reports/RkMVpWnj2Bc9ATN7#fight=3&type=summary

HEY ROGUES LOOKING FOR SOME INFORMATION ON OUTLAW AND SUB...BEEN PLAYING ASSASIN SINCE THE BEGINNING OF LEGION AND THINKING ABOUT TRYING A DIFFERENT SPEC ANYONE HAVE A FEW TIPS ABOUT OUTLAW AND SUB??