is this Katsugeki Touken Ranbu anime? I will try to give some input from my personal raw analysis
The Second Unit (Izuminokami, Tsurumaru, Tonbokiri, Yagen, Kunihiro) ... their attack potencies are from Athlete to Wall level at most (Tonbokiri VS Ootachi), for Speed I will say around Athletic to Peak Human
as for The First Unit (MIkazuki, Yamanbagiri, Hizamaru, Higekiri, Oodenta, Honebami) .. they are on different level than 2nd unit, even the weakest, Honebami, could beat an Ootachi single-handledly without injury with some effort, unlike Tonbokiri from the 2nd unit that took a serious injury even after killing just one. I'd say the First Unit's Attack Potencies are range from Wall to Building level, ... Speed are range from Superhuman to Subsonic, and possibly Supersonic+ reactions/attack speed
and the most likely powerful one, Mikazuki Munechika, could be on Tier High-8C (Large Building level) as he defeated a fusion of several dozen of Ootachis and some random Time Retrograde soldiers into a single powerful being with relative ease.