Alittle dilemma.Follow

I want to make a hunter for pve , which focusses mostly in marksmanship , and alittle in beast mastery. I planned the following talents.

Beast Mastery Mastery
Endurance Training Rank 5
Bestial Discipline Rank 5
Unleashed Fury Rank 5
Ferocity Rank 5

Marksmanship Mastery
Improved Concussive Shot Rank 5
Efficiency Rank 5
Lethal Shots Rank 5
Aimed Shot Rank 1
Mortal Shots Rank 5
Scatter Shot Rank 1
Hawk Eye Rank 3

After this I have 6 talentpoints. I am planning to get Trueshot aura , so I need another 5 points in Marksmanship. I only have no idea where to put them.

3 Improved Scorpid Sting + 2 barrage.
5 Improved Serpent Sting.
5 Ranged Weapon Specialization.

It's either 1 of these 3 choices. But the main thing is , will I use scorpid sting of serpent sting alot more later on? Because both look appealing. And does the ranged weapon spec 5% more dmg based on your total dmg , or based on your "base" dmg?

You have a point there. :D Anyway , Does the 5% dmg of ranged weap spec work on your total dmg or does it work on your base dmg. Because if it's only from base dmg , that 5% doesn't look all that great IMHO. you're lucky to get 2 DPS that way or so.