Sounds like you really don't want the Entire + OEM cluster if you want to delete quite some packages..
Anyway, using the clustertoc you can determine which cluster a package belongs to, from there you can delete them in your profile using the "delete" keyword.
For example; to make sure that ApplicationServer / IMQ/WBEM/staroffice is not installed:
cluster SUNWCwbem delete
cluster SUNWCappserver delete
cluster SUNWCiq delete
cluster SUNWCstaroffice delete
.. you can do a similar thing with individual packages, to avoid installing the time/echo/discard and chargen inetd services on a server you could type:
package SUNWcnsr delete
package SUNWcnsu delete
.7/M.
package SUNW