How to use multiple tables in DRIVING_SITE

Hi All,
I see very bad performance with my query having dblinks to remote database.
How can I use DRIVING_SITE for multiple remote tables here?
Does it it useful to use on DRIVING_SITE multiple tables?
What is impact of using ORDER BY on local table column ( table A in below case) in the query?
SELECT A.col1, B.col2 , C.col3
FROM A, B@dblink1, C@dblink1, D@dblink2
WHERE <few join conditions>
ORDER BY A.col1 ;
Join conditions in above query is taken care to have better performance. But from our analysis it is understood that poor performance is due to DB Links to remoate database. What is best approach to get good performance with DB Links?
Regards,
Ram

http://download.oracle.com/docs/cd/E11882_01/server.112/e17120/ds_appdev004.htm#ADMIN12196
Will give you an idea of where to start.

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