By the time you get to this chapter of the game you should know what to expect to get through the main portion. Here are couple of tips.....
1. Save your focus till you fight the five gladiators (refer to the 22:35 mark). They are very tough and will take huge chunks out of life. I recommend having at least two focus bars saved. I didn't save any focus and I really struggled at this level because they gang up on you.
2. If you are like me, you probably had trouble during the Commodus look-a-like section. No worries. DO NOT PRESS Y. Wait for one of them to strike, block it, and hit him with a sword strike twice. Rinse and repeat. It takes forever but it is an easy way to get through this section. Once there is only two left their attacks are less predictable and they will team up on you. Simply take your time, block and counter attack when appropriate. Do not rush!! You got this far, don't rush and screw up.
I attached a great video for those who like a visual aid. I do not take any credit for the video. Please leave a comment if you have any suggestions on how to make this solution better. I will correct it and give you credit. Thanks and good luck. FOR ROME!!!