Reclaim unused Space

• As part of archive process we delete the rows from the tables from the primary  storage once the data is moved to archive storage

• The delete Process leaves the fragments in the tables and as the tables grows .

• 
  
• oracle provides many options to reclaim the space /defragment 
• Redefine
• Shrink

     but any of these features requires ample amount of data base green zones which is not viable for high availability platforms.

what are the alternatives?