Xp.. cooperation

Hi All… im level 50 and i ply in tvhm mayhem 3. i mainly play solo… tonight i decided to give campaign match finder a go… i entered someone else’s game/mission path etc etc, and i was gaining average 4K XP each NPC kill! the legendary drops were more frequent also… i normally only pick up 400+ XP on tvhm mayhem 3 on my own.

am i missing something? do i have it on the right mayhem mode??? or is correct?

Drops, difficulty, and exp all scale with number of players to make coop more enticing