I use Axis and Ohs and have a bit of a mixture. A&Os does axies and buttons and scripting and a lot more besides. It is very powerful, but I find easier to do simple things with than the similar FSUIPC. FSUIPC also has (had?) issues with the CRJ, which was one reason I changed.
I retain the in sim default button mappings for the camera - simply because that was easy to do - but have removed all other “in sim” button and axes mappings and use A&Os for them. It works very well.
There is a great thread here where you can ask any questions of the community:
There is also a great web resource here for scripts and button mappings for many of the available more complex aircraft: