I have not seen any published DevTest recommendations other than the DBMS default for most of the options above. For example, db_block_size=8192, open_cursors=50 and so on.
Perhaps, others have additional information on these settings.
Depending on VSE usage (functional vs performance) and the # of days your DB cleaners are set to run, the recommendations are:
Registry tablespace = 500GB
Enterprise Dashboard tablespace = 50GB
I found the above references here: System Requirements - DevTest Solutions - 10.0 - CA Technologies Documentation