Any player under cumulative level 1,000 can reset skill ranks by speaking to Duncan in Tir Chonaill.
Unfortunately, once you’ve spent your AP (Ability Points) above this rank, you can’t get the AP back without using a Skill Reset Capsule.
You can purchase Skill Reset Capsules in the Web Shop for 2,500 NX each.
Each Skill Reset Capsule can downgrade a single trained skill by one rank, returning your AP for that rank.
Skill Reset Capsules can only be used on skills that are rank E or higher.