Hi, I'd like to know if the perk 'Sharpshooter' adds permanently 2 points of perception or not, because the description is not very clear to me: 'You've become very good at killing your enemies at long range. This perk increases your Perception by 2 when you are using a bow or crossbow'. In the case it would add +2 to Perception, I'd plan to build my character as follow:

Human/Elemental Spirit
ST: 1 (2)
PE: 6 (7)
EN: 8 (9)
CH: 5 (6)
IN: 8 (9)
AG: 9 (10)
LK: 4 (5)
Traits: Gifted and Skilled
Tag Skills: Ranged Weapons, Diplomacy, Fortitude.

If Sharpshooter really adds a +2, then with the Stargazer perk I'd reach 10, then another 10 in EN (+1 by joining the Templars), 10 in IN (+1 by doing the final quest of the Knights of Saladin), 10 in AG (+1 from Gifted perk), and a final 10 in LK (thx to various items that add +1 to luck each time + 2 potions found in the game).
Can anyone confirm about the Sharpshooter perk please, and is this build valuable?