If you apply for staff, are you staff for all the different worlds? Say you want to be staff for survival, are you just staff for one world?
Different worlds meaning pit and build world? If so, it is server wide. In my books, a mod is a mod. Not just part of the server, but all of it
I think you start off as survival staff (if you make it) and branch out if you are active on those servers and have proved worth as mod/admin and yeah don't quote me 100% about that though, due to any lack of experience whatsoever as being staff here
It depends on each person's situation. Some of our staff are staff on multiple servers and some on just one. It's really on an individual basis and according to what needs to be filled.
What Sica said a lot of the time it also depends on your activity on other servers and with the general player base. Being active on TS is a plus too
If I got staff, I would just want to be staff for survival. I like all the other games types, but I prefer survival.