Working on a 12th level Syrinx Hunter, with a Roc Companion (The closest I could get to a Giant Owl).
Any general advice on the direction I should go? I was thinking Stealth Synergy with Flyby Attack and Death from Above, the low dex is bothersome...
The only Hunter guide is missing so much info (or expects you to go back and forth between different guides to evaluate companions and such). And of course, fails to address unique races (for obvious reasons), such as the Syrinx...
So I guess basically what I'm asking is... are there any things that are must-haves for a solid build? Magic items? Feats? Priority list for Teamwork feats (particular with a low Dex)?
Are you planning to be mounted on the roc, or flying separately? It changes a few things.
Pack Flanking is useful regardless as is Improved Spell Sharing (I would call both must-have). Escape Route and Lookout are good to have; Wild Flanking (Betrayal feats are Teamwork feats) has its points. Broken Wing Gambit + Paired Opportunists is a neat combo. Yes, you only get 4 bonus teamwork feats but for a hunter it may be worth spending general feats on them too. Less so if you're getting heavily into mounted feats which chew up a lot of your slots.
Flying Separately.
Right, then you're more likely to be in positions where you can force AoO's; I'd consider a Fortuitous weapon and move Broken Wing Gambit and Paired Opportunists up the priority list. No other weapon properties though, you want as big an enhancement bonus as you can afford. On armor, Spell Storing w/Frigid Touch is a favorite of mine and hunters can provide the spell.
On non-teamwork feats, consider Planar Focus and of course Fly-By Attack. Plus the usual combat feats though I wouldn't consider combat maneuvers on a less than full BAB class at this level.
A Stone of Alliance is worthwhile to save your AnC when necessary.