Super quick combat rogue guide here, might write a more in depth one at some point but this is just the very basics...
OPENER:
Ambush > Revealing strike > Sinister strike to dump energy > Slice and dice when at low energy > Killing spree > Shadow blades + adrenaline rush
ROTATION:
Spam sinister strike for CPs
Keep Slice and dice up 100%
Keep Revealing strike up 100%
Rupture is only a slight dps boost but try and keep it up on single target
Use Killing Spree and Shadow blades + Adrenaline rush on cooldown
REFORGING/GEMMING
Hit to 7.5% > Exp to 7.5% > Haste > Mastery > Crit
Haste, haste maybe a bit more haste if your haste is high enough, then some more haste on top of that haste. Expertise and hit cap then haste and haste and haste. Then mastery.
For gems it's usually:
Red - Agi+haste
Yellow - Pure haste
Blue - Hit+haste
PS Assurance of consequence is the best trinket in the game for combat by far, GET THIS TRINKET ASAP.
Anyway that was a pretty basic combat guide for anyone too lazy to read a proper one.. gg get some sick deeps next raid lads