As observed by the sam seigan/hasso update. It only effect ranged attacks if you use a staff or such 2handed weapon for the stats to be effected. So yes, it effect rangers in and anyone that's willing to use 2h weapons.
Oh wait forgot the main thing. The atk and accu isn't rng atk and rng accu so yea. It don't effect rng's main role of dmg.
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