Need Help here (Mission 8.8)

Hello,

This is my team, but I cannot win with it
Gammond Gold3 6*
Mandrake Gold 6*
Maven Gold1 6*
Matador Gold1 6*
Heimlock Gold 6*

Any ideas guys??? Thx

Its is a dps check which is very common in other games as well. Either you have enough damage or you wait till you have enough damage.