In horde mode 3.0, I have a group of friends and we each stick to one class of our own, me being our sniper. We do Hardcore on Glory

Me as Sniper: I have headshot damage maxed, rifle damage maxed, reload maxed, and ammunition maxed. Those are the four cards I can run. I am not level 10 yet so I can only run four cards. Im still waiting for the legendary card explosive headshot.

Our Scout: Is maxed ALL THE WAY.

Our Heavy: Maxed out Explosive DMG, clip size. Heavy weapon dmg, bonus dmg on mark.

Our Engineer: He has upgraded repair efficiency and all the other stuff. He needs sentry cost which is at the mercy of RNG.

When I'm reading that people are running double heavies, double engineers, or double scouts, it adds to my feeling that the sniper stronger attributes. If the heavy can kill the tanks much quicker with collateral splash damage, why should I bother headshotting those tanks with my embar? We plan on running insane in the future once we maxed out everything.

Is there a reason to use a sniper. Everyone I have talked to says that you can do away with the sniper in groups. Even some youtube videos talking about the sniper class agree too.