Well I kinda forgot but I was keeping it in vault and thought it can three headshot kill in Crudible soo i need perfect roll for it.
Zen Moment/Flared Magwell/Third Eye
or
Outlaw/Armor Piercing Rounds or Send it/Third Eye
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LitC/3rd eye. If you mostly play control firefly could be considered. I'd stay away from outlaw and CC on long range/slow fire scouts like Gheleons. You'll get hardly anything out of those perks.