Stats help?

[normal quest]

Stats help? I feel that my mastery is way too high , but unsure, mainly enjoy raiding and delves, some mythics but mid keys only 6-10's

https://worldofwarcraft.blizzard.com/en-us/character/us/khadgar/greygull/

[grand iron]

stats dont matter, sim your gear with raidbots.com and it will tell you what's good and what isnt. Stats are genuinely fake as hell. You can get a rough idea of whats likely better but all of these "ideas" about stats come directly from our sims - so just skip this step and go straight into sims.

[normal quest]

Thats what i have been doing thx, usually use SimC instead of raidbots, thx!