people failed to defense towers from red towers and AIS because of bosses spawn in
And there is the issue, the only time red towers ramp up is when people rush to defend whitchever tower is attacked atm. If every tower had 1-2 people camping them then this wouldn't be a problem. And for the last phase especially, you don't need more than 1-2 people per side for tower defence. The rest should be beating up the boss.