Trying some stuff but here are some finds:
> if they say "let's go" a grenade-slide works wonders. THey'll rush you and run right in the grenade for some nice damage (bonus damage if you shoot the grenade). After that they bounce out of reach though.
> if they rush you the attack is best dodged by either:
- putting your back to them and dodging backwards (hard), this way you can start a new offensive really easy.
- dodging forward underneath them (easy), but this way you need to turn again to start an offensive.
Focusing on the Red Bogey right now as he doesn't move as much as Blue does, his sniper shots are less dangerous at close range and he's just a lot easier to see as Blue blends with the environment (at least to my eyes).