Playing as group is easy mode

4 Guys =
400% damage
400% Health

Monster =
116% damage
260% Health

Thats 1600 DoH versus 300 DoH
(Means a single player would need to mod the Monster HP to 20% to have the same difficulty)

Btw why do i have the perception that most people state here all day that they are the Super dooper elite player, play as teams