the +5% high ground damage affects All types of damage of you do so it helps arrows and spells alot.
Yes, but it's weird that Huntsman is only good for a hybrid build, not for a pure ranger. Not sure what it would take to make Huntsman generally superior to ranged. Maybe 7% damage bonus from height per point? Still not sure if that really compares with a non-situational increase of 6ish% (5% + 1 % crit) damage from Ranged.
