Then while they're all focusing the Titans in your scenario, the Warlocks would Nova Bomb them to oblivion. Besides, The Golden Gun Hunters would do it immediately because they KNOW they can't win a straight up fight and they'd want to limit enemy numbers, while the Arc Blade Hunters charge forward. The Striker Titan's running shield would take the brunt of the Golden Gun attacks, leaving them unable to use Golden Gun on any Ward of Dawn bubble later. This is all in the first run anyway, Second and later runs would have many different tactics to not make the same mistakes. All classes would adjust after their fall, Titans would attempt the same strategy the second time, see it not work as well, then adjust for the third run. And let's be honest, what would instill more fear and hesitation into an enemy, a golden gun or an arc blade?