Need advices for plasma gatling

[Mr.Zombie]

I recently got a plasma gatling and since I want to use it in my power armor build I need to improve it, beside the mods (I got only 2 of 4 by scrapping like 7 gatlings) I was thinking about the legendary perks, is anti armor good?
Since I'm kinda new to the game I don't have many fusion cores or modules but I can roll it like 5/6 times, the best possible roll I'm looking for is aa +25% damage while aiming and 50% durability, do you guys have any advice?

[madcow]

https://www.youtube.com/watch?v=q8xkjDpe7Gw