I've been doing personal airgun work for about 6 years now and while the quality of tools I use has gotten better , the types of tools I use has stayed the same over the 31 or so airguns I currently own.
This has been all I've really needed aside from the specialty tool required for opening the soldered in valves (it's a cartridge valve with one half soldered into the compression tube ) on original pre '92 Benjamin and Sheridan airguns.
I borrowed one when I last needed, and just have not purchased my own yet.
My area of airgun interest is mostly just multi stroke pneumatics with a few Co2 guns, and I'm an iron sight kind of guy with only one scope I occasionally use.
There's really not much more you need to reseal a multi stroke pneumatic airgun, just the ability to not bugger up any roll pins or screws and of course the rebuild kit.
Same goes for co2, in fact vintage American co2 rifles and single shot pistols are even easier to work on.
Modifying them is a different story.
There's really not a lot of difference in the tools one would use on firearms, there are just a lot less specialty tools needed and you don't use any kind of solvents and such in basic cleaning.
Really bore cleaning tools aren't even generally used.
I've got a few tools on the way, but generally this really is about all I need.