Hi ,
Just to be sure I understand your scenario...
Your are moving an MCOD Abap + Java from a single host A
to have an host B with Abap only and an host C with Java only ?
If so your scenario is fine and I could not think of a faster method.
Maybe you could delete Java schema after exporting it and before the backup in order to have less data in the backup set and be able to copy/restore it faster to host B... but Java schema is not that big so you won't save a lot of time.
You can save time also by switching to an incremental backup (activating block change tracking => 964619 - RMAN: Incremental backups with Block Change Tracking), take a full backup on Wednesday night, restore it to host B. Let the system productive on Friday and on Friday evening just take an incremental backup that will be faster to process & restore.
If you are willing to keep host A with Abap schema just follow the steps described by Reagan.
Best regards