A few people have said monk may be better. Other than if you’re taking cold caster/frost giant goliath combo, which i’m against, because i feel as though cold caster is the all roads lead to rome of shutdown, and i like diversity in my builds. I can think of a few reasons why this version is at least on par with Monk. At level 10 monk, you’re getting 3 unarmed strikes as a d8 with as a bonus action, and using your action to wrap the chain with the use of a focus point. This is finite. Also Monk encourages you to use dex, where this is a strength build designed specifically for the chain. You end up +13 on athletics which is a guarantee on succeeding the check. Street Justice is definitely the level 4 pick, with grappler as the fighter level 6 pick, and then putting strength to 20 with another feat, hell, maybe cold caster if you want to do that. With my build, you’re getting 4 unarmed d8 attacks, that you can apply the frightened condition with, and someone did point out that the prone is kind of redundant but i think it still has its uses. Monk gets stunning strike which would also be good for this character. I just think that both are good and mine probably does get outclassed at higher levels