Drums improvements request

Hi, I have a few feature requests regarding the drum kits in Cubasis…

I’d love to:
-be able to build a custom drum kit with my own samples
-be able to map custom or existing drums’ midi notes to match my hardware drum machines, so I could easily sequence external drum machines that are interchangeable with the ones in Cubasis for when I’m on the go
-have a drums mixer subgroup to adjust the different parts’ levels
-be able to export the different drum kit parts as individual audio files


I’m thinking of using cubasis however, I need decent midi drums for mostly rock, metal. Can anyone tell me if it’s worth it. I’m currently using reaper and superior drum but would like to start recording using the iPad for convenience.

I know you can import into cubase but can you port into reaper or another daw?