Short version of rant from other thread:
ARC punch is stupid.
Remove ammunition, convert arrows to quivers (bottomless, allows for level-appropriate or situational status ammo), make Light Shot auto attack.
Likewise, leave mage ranged auto attack.
It's not game breaking, it's just sensible. Mages aren't going to be in melee range, neither are ARCs. Don't disadvantage classes by giving them auto attacks they'll never use.