[Q] Root and custom recovery question topic

Hello? I was recently s-off, unlocked and using Adrenaline sense 6 lollipop rom.
Yesterday, I went back to stock 4.4.4 using the ruu file. I still have the s-off and unlocked.
Now my questions are..
1. Can I install custom recovery first then root by using supersu.zip file?
2. Or do I need to root first by weaksauce or something then get custom recovery?