cassette service for removal need a spline removal tool and a handle,
be it a breaker bar , ratchet or an adjustable wrench,
depending on the tool and a chain whip..

to tighten , just the spline tool.

and another set of allen wrenches, other than the portable tool set.
Bondhaus with the ball end hex on one side..

save that alien, for fixing things in the middle of the ride,
like if you forgot to tighten it. properly in the 1st place.. .