Soloing The Temple of Ahn’Quiraj can be quite profitable and getting some extra cool transmog gear and mounts doesn’t hurt either. All the bosses can easily be soloed at level 90, only the Twin Emperors can pose a challenge, though they are pretty easy as well.
To solo the Twin Emperors Vek’lor and Vek’nilash you have to only attack the right one. The left one is immune to melee damage, but they share HP so you only need to kill one. Position yourself behind the right along the wall so they cant know you back. You will need to maintain a steady DPS as they heal and you have to out DPS their heals. Use your cooldowns when you can, Killing Spree is very useful. If you are having trouble with them, keep recuperate up at all times to keep your HP up and use Leeching Poison as well to heal. I have terrible gear on my Rogue but as you can see in the video below, i can maintain good enough dps to kill them while still using my combo points to recuperate.