(Re)create user/schema using DataPump

Remember, one thing Datapump doesn't do (by design) is recreate grants to objects owned by SYS.

If the user does not yet exist on the destination database, just import it using the procedure outlined here.
Or if you are asked to create a user 'like' another user, use this:

$ expdp schemas=CURRENTUSER content=metadata_only
$ impdp remap_schema=CURRENTUSER:NEWUSER

If however, the user(schema) already exists, it will have to be dropped and re-created before the data can be imported.
Run this script to generate the recreation DDL
After this has been run, the following command can be executed:

drop user <schema name> cascade;

Now, recreate the schema with the above-mentioned DDL
The dumpfile (or a part thereof) can now be imported to fill up the currently empty schema:

impdp <usr>/<pwd> parfile=schema.par

where schema.par would look like this:

directory=DATA_PUMP_DIR
dumpfile=<schema_name>.DMP
schemas=(<schema_name>)

and/or maybe one or more of the following:

exclude=grants
tables=(<schema_name>.<table_name>)
remap_tablespace=old:new

Finally, recompile all invalid objects:

exec utl_recomp.recomp_serial();
or
exec utl_recomp.recomp_parallel(4);
or
@?\rdbms\admin\utlrp.sql
or
@?\rdbms\admin\utlprp.sql(4)