Weapon Skill Damage is worthless as if you did 1000 Dmg it would only add 20 dmg. The 4 Agi is nice but you would be better off with 10 Ranged acc/5att. And you don't need the Agi for card shots since you should be useing the AF1 Hat instead.
The AGI +4 would be more for a WS mod. Adding more acc i think would be overkill no? Id think AGI +4 & 20 DMG>R.Att. +5. Depends on one's set-up I guess.