Fuhatsu is great for bodyguard. Get an initial push on him to get him out of your deployment zone and then he has a massive area of denial around him and takes a lot of killing. Samurai is a better all rounder I grant you, but actually not that durable.
For scheme running, especially power ritual, I love torakage. Pricey, but with smoke and shadows, immunity from disengaging strikes, push on shooting etc they operate well as isolated scheme runners. Learning to use tengu now though as I've got some proxies sorted.
I like Yamaziko a lot especially when you know they are going to be getting into melee range - assassinate, reckoning, lady justice etc. Her brace yari and 3" melee range can be really useful to create a safe bubble for other models.
For any scheme/strat there is a lot of love for 10T brothers but I need some suitable models for these!