NDMP backups into a TSM storage pool will not be deduplicated.
If you set ENABLENASDEDUPE YES, that only affects NetApp backups.
IBM doesn’t make the NDMP code, so they don’t support deduplication of anything but NetApp.
That means neither IBM’s v7000 Unified backups, nor any other NDMP device, get deduplicated.

As such, go ahead and have your NDMP backups go to a DISK pool or direct to tape.
Sending to your dedupe pool will just clog things up.