People will use whatever benefits them. This strategy, while it is annoying, can easily be countered by A: stay away from the mass of bubbles until the team is out of energy B:Fist of Havoc C:Arc Blade D:snipe the gunslingers when they come out, if you're good enough. E:play PvE instead It's not like ti's happens every game- it pretty much requires a team of 6 people who are all communicating with each other.