"hang back all you want, but my atlas is gonna have a 7x zoom module and a guass rifle, your face is sniper meat!"
First, you'll have to win a LOT of battles in an unmodified Atlas to earn enough XP to unlock the Zoom modules & the Loyalty Points to unlock the Gauss Rifle. Then you'll have to hope that the head hit location is big enough to hit reliably. Then you'll have to hope that your 100-ton high-tech Atlas is in the same battle pool as a low-tech 65-ton Catapult. And while you are standing still lining up the headshot on the Catapult, his gauss/PPC sniper team-mates are doing the same to you & his Jenner sidekick is nomming on your back armour.
I'm just curious, where are you getting this Loyalty Point stuff for unlocking weapon components? Not saying it's wrong or a bad idea, but I haven't heard it before.
That said, these hypothetical snipers might be surprised when said Catapult is rocking them around with it's SRM spam instead.