Need help improving my dps on my frost dk

i know something is wrong i need a little help… my dps is doing around 11k on the dummies but far less that in actual lfr raids… im not sure what to do at this point.

illidan - rional - dk

Step 1- Look up WoWhead Frost DK rotation and talent tree builds.

Step 2- …

Step 3- Profit!

i dont understand what im looking at but i may have solved 1 of the two problems…

Prolly best to post on your actual DK you are inquiring about.

Do you have a log?

Also there are addons like hekilli that will help you a bit with the rotation. Not great for max level play but a decent tool to help learn.