August and Raphael, in normal circumstances, could be considered around the same level in power.
When August caught up to Eris, he caught up to all of them. If August wanted to fight Raphael properly, then it would likely take many hours for them to determine a victor.
However, this was an environment that catered towards August. Plus, it was a place where he didn't have to worry about collateral damage.
August liked to fight in stages. If he didn't know his opponent's power, then he would test them in each aspect before formulating a plan to defeat them.
He didn't have the time for that. With a preliminary understanding of what Raphael could do, he had to figure out a way to defeat him in the least amount of moves possible.
How?
Naturally, the answer was brute force. It was Raphael's favorite method, and it was a way of fighting that August learned deeply as he observed his father and ancestor.