Returning player back from dragonflight

I just purchase War within in like every new expansion I make a new toon. I have a 71 horde rogue druid warrior and hunter. I do have some 60s but there allience in not on Area 52 horde side I was wondering which class spec is top of charts as damage Right now should I make a new town or just level my horde rogue to max? Also lf horde guild on Area 52

Top of charts is unholy dk and you should level your horde rogue to max just because it makes leveling any other character 5% faster, then if you want another one you can do it 5% faster (if you plan to level both anyway)