Identifying SQLs causing the highest Redo

How do you identify SQL statements that cause the highest Redo ? I cannot use V$SESSSTAT and "redo size" as these are sessions that are created and dropped very frequently.
However, the SQLs seem to be shared.

I am not sure that I can use V$SQLAREA BUFFER_GETS or DISK_READS or StatsPack listings of
SQLs by Buffer Gets, Disk Reads or Executions.

I know I can set MONITORING on individual tables but that still won't help me identify the SQLs.

Hemant K Chitale
http://web.singnet.com.sg/~hkchital

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