Hello,
So, it was a bit annoying in S1, boring in S2 and absolutely insane in S3.
I'm talking about cancer team that are unkillable in defense. In S3, some team are just a joke, especially the fire/radiant and some ice team as well.
People don't make a team to fight, they just make a team to not loose until the timer is down.
How many times i have all my team alive and i can't kill just 2 heroes !!!
I suggest that the times should be not against the attacker. You can add a draw system or even better determine the winner based on the number of dead character in each team at the end of the timer.
This way, we have to create a team to defeat the enemy and not just to stay alive.