Here are some ideas (I know I posted snipe shot on another thread):
Beast Mastery:
Tier 9-
Bearlike Endurance- 3 ranks
Increases armor by 10% (per rank)
Attunement To The Wild- 2 ranks
Increases all attributes by 2% (per rank)
Tier 10-
Ravaging Blows- 5 ranks
Causes each melee strike from your pet to have a 3% chance (per rank), to apply a 15 second bleed effect to the target, causing them to bleed for 2% of their total health every second.
Tier 11-
Lycanthropy- 1 rank
1000 Mana, IC, 1 min duration, 5 min cooldown
The hunter and his pet join, creating a half-beast, half-human with appearance similar to the pet (i.e. a cat joined will look different than a wolf joined.) Your damage, attack speed, and movement speed are all increased by 30%. While in this form you do not feel pity or remorse or fear and cannot be stopped unless killed.
Marksmanship:
Tier 9-
Improved Aimed Shot- 5 ranks
Decreases the mana of Aimed Shot by 5% (per rank), its casting time by .4 (per rank), and its cooldown by .2 sec (per rank.)
Tier 10-
Blood Fever- 3 ranks
Increases your speed when fighting by 10% (per rank.)
Ranged Mastery- 2 ranks
Your chance to miss with ranged attacks is decreased by 40% (per rank)
Tier 11-
Snipe Shot- 250 mana, 2 sec cast, 30 sec cooldown, 35-75 yd. range.
A long range shot that deals 50% weapon damage and stuns the target for 5 sec.
Survival:
Tier 9-
Weapon Familiarity- 3 ranks
Increases the max skill with gun, bow, and crossbow by 5 (per rank.)
Strength in Adversity- 2 ranks
Increases damage by 15% (per rank) when your HP is below 25%.
Tier 10-
Battle Scarred- 5 ranks
Reduces the chance that the hunter will be affected by charm, fear, daze, and stun effects by 10% (per rank.)
Tier 11-
Camoflauge- 1 rank
175 mana, IC, 2 min duration, 30 sec cooldown.
The hunter instantly melds into the shadows, moving at 50% speed. This is treated as a stealth effect.
Well, whaddya think?