Honestly I have no issues going all out or they start normalish and escalate. Mostly what I wanted to do is force Hawk to make use of the darker version of his Berserker power. With this power he pretty much is capable of ignoring pain and injury (besides stuff like broken bones) and can fight at full strength until he's unconscious, dead, given a disabling injury, or he's been fighting too long and exhausts himself. He'll definitely give Yuber a run for his money even if he ultimately is defeated just because it's so hard to get him to go down and stay down.

Here's a video of the actual duel in game with him like this so you can see some of the skills he uses: https://youtu.be/7b06cR_Fag0?t=2107