Torque wrench is handy.
As is some Torx and Allen tool bits.
Air shocks - you'll need a shock pump.
I thorougly prefer the kind with a separate open/close feature.

Tubeless tires "require" a high-flow compressor to seat. There are plenty of workarounds being used by those w/o compressor access.
It can go years between uses, but when it's due, a real bleed kit makes dealing with hydro brakes considerably easier.