How to set up an accessible mate

[Cleverson Casarin Uliana <clcaul@live.com>]

Dear,

I'd like general instructions on how to set up mate with Orca on Debian 
Jessie, i.e., what packages should I do aptitude install. My system is a 
plain Debian without desktop, i.e., I have installed only the utilities 
under tasksel.

Also, is there currently some known serious bug related to using mate as 
a regular desktop with Orca and popular applications?

Many thanks,
Cleverson