Let's have a look at your armory to get an idea of your potential. Mind you, being a skilled player can make crap gear look good and vica versa... So take it with a grain of salt. Also, Moonkin's thrive by party play/certain buffs, meaning target dummy dps is not an accurate messurement, but will give you an idea of your potential. Add to that your great aoe possibilites for a hefty mana cost, that will have you drinking a lot in 5-mans. Adjusting your gameplay here or possible talentspec will help greatly.
Talents:
To allow decent dps but maintain some manaregen, I would advice you to start with something like
this. Then when you notice you can't get rid of your mana fast enough, drop 3/3 dreamstate for 3/3 IFF and after that 3/3 Intesity -> 2/2 Gale Winds and 1/1 Force of Nature. Your gear will mainly determine these choices.
Gear:
You have run several dungeons and gotten some nice blue items. You are therefor not badly geared. Your trinkets and main weapon could be easily upgraded, depending on drops/gold of course. Consider a crafted weapon. There is also the arena quest from
this npc.
Another great source of gear would be reputation. I see you are mostly honored, some friendly with northrend factions. Have a look at some of them for great blue/epic rewards. The reputation grind isn't that bad as you might think. Perhaps at your current honored level there are already some nice rewards. While talking about rewards, start doing your
Sons of Hodir quests to end up with your sole source of pve shoulder enchant.
Then there is of course crafting your gear. And seeying you are quite far into LW, this could get you some great items. You will need lots of heavy leather and Arctic Furs, but seeying you are a skinner aswell, you could easily grind them in a cave somewhere. Have a look at the
lvl 78 craftables or the epics. Including your LW specific bracers enchant (+67sp).
About the stats: Shoot for 15-16% crit while in non-moonkin form. Then add as much spellpower you can, while also increasing haste. Haste has a great effect on your dps if you maintain a lunar rotation (starfire spams). Don't go for mp5, but rather spirit. Also hit is important enough to try to cap it, but while doing dungeons and heroics, don't overdo it. The mobs in here are not Raid level, and thus (im too lazy to look it up, estemate:) only 160 or so hitrating is needed instead of the 264 raidlevel hitrating.
Enchants: Drop the stamina enchants and start increasing stats that improve your dps, Spellpower and haste or +8/+10 stats to chest. Icewalker to feet (hit+crit). This goes for gems aswell, though combinations with spirit are also fine to gain a socket bonus/metagem.
That said and done, your gear does not look bad, but not quite good enough. You will have your work cut out for you. I haven't been a fresh 80 in similar gear for some time now, so I don't know for sure what your dsp would be, but I would think you are not quite there yet for heroics. Your spellpower and crit combination is quite low. 0 haste is no problem as you are only just now 80 and hitrating 22 is not there yet. Very depending on your skill and rotation if you can keep on performing. General target dps for heroics is 1500+, though less is very well possible but will put more strain on others to perform.
Anytime you have any questions feel free to ask, glad to help, presuming I actually did help... Good luck, moonkin will give you lots and lots of fun, now /dance!