to convert smart-licenses back to traditional licencing (2) you need to contact Cisco.
there is no on-line tool to do this.
I don't think you can mix licenses (3), the procedure for (1) will be:
- convert your own PAK based licenses to smart licensing, using your own account!
- your partner needs to delegate your account access to (a selection of ) their licenses registered on their account
so they still own the license, but you get access to it
- then you can add those license to your Prime environment