Saurfang is an easy fight. Make sure you manage 3 things:
Melee AOE. Don't do it if you don't know when it is ok to do so.
Blood beasts. Ranged must CC and spank them down quick smart. No staying on DBS to top the meters.
/range 10. Everyone stay nice and spaced so you don't heal the boss more than you have to.
Festergut: for the love of god, know how the spores work. Healers must preheal and preshield tanks on 9 stack changeover. Tanks must use CDs on changeover.
Rotface: staying alive > dps. Learn the mechanics and stay alive. You can't dps if you are dead. kite your ooze. watch out for big ooze go boom.
Your gear is easily fine for 6/12+