Depends upon your series. But A well designed (aka triangulated) cage, even if a bolt it is better than a stock cage with reinforcements.. Rock bars are good., as is a metal roof. Doors - fixed can be a pita to crawl over, and worse when working in the motor / clutch. Double locks are a must.
As for saftey - our last cage was 1.75x.120 DOM for the main tunes - considered to be way overkill by many- until a racing incident and it bent to zhit.
Mavs have a big open A pillar - a weak spot. No aftermarket builder (yet) has a bolt in cage with a A pillar brace or intergal / opening door bars. Our does - and photos will be up on Wed.
Other Mav stuff - CR Racing chassis braces, tie rods, dual rate springs and shock revalve. Stock primary & STM secondary, Gorilla rear outer CV's. Or the new XDS clutch and rear axles.
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Maverick XRS