I'd talent
like this. More AP from Battle Shout > Unbridled Suck.
Things to remember when DPS:
Stay on target, don't get distracted, hit the tank's target and don't stop until it's dead. Uptime on target is a major piece of overall damage output.
Do as much damage as threat allows. Download a threat meter and live by it's bars. Never over-threat your tank.
Don't stress minor upgrades. Leveling gear sucks more or less, don't sweat it too much.
Did I mention uptime on target?
Single-target DPS suffers in leveling instances compared to the classes with early AOE. Don't worry too much about meters, they are basically meaningless outside of raiding.
Cheers!