Question Which weapon class is the least painful camo grind?

Grinding camos on everything and my soul is leaving my body. Trying to figure out the least awful class to knock out. ARs feel steady, SMGs are fast but chaotic. Anyone found a class that just melts through the challenges?

SMGs if you play objective - the CBRS-3 with its 60-round mag (unlocks on the Season Four Battle Pass) chews through close-range challenges fast. ARs are steadier but slower per match.

Shotguns first while you're fresh and still have the will to live. Save the launchers for last, they're the real grind killer.