You don't need headgears or even most equipment to test formulas and skills.
No offense, but you run around on Sakray with Incubus Horns and a Demon Mask. We want to test out stat builds (so we don't waste our resets on the main servers) as well as skills, I don't see why we aren't allowed to have certain headgears to do that with.
I vote for a headgear NPC, too.