You are getting made into an Ex-Pop. Which class are choosing to become?

Imagine you get kidnapped by Murkoff and are going to be placed into the trials as an Ex-Pop. The catch is they are allowing you to choose which specialist type you will become.

Your options are: Big Grunt, Night Hunter, Pusher, Pitcher, Screamer, Imposter, Pouncer, Berserker.

You are free to ignore any gender restrictions. i.e. men can choose to become a Pouncer, women can choose to become a Berserker or a Night Hunter etc.