As a startup, I copied what Elisha Tanikonda for early version of smart investigate running on 61sp2 - let's wait for SMEs to provide insights. But I believe for the most part, the list below is still valid. If necessary, create a SR for further investigation.

Provided the below suggestions to the customer.

For BIX
========
pr_extract_time

For PRPC
=======

pc_work  —  Primary work object record
pc_history_work —  Audit trail details
pc_assign_* tables —  Incomplete assignments 
pc_link_attachment — Associates a work object with attachments, optional files, e-mail messages, or images.
pc_link_folder — Support folders, an  optional facility for grouping multiple work objects 
pc_data_workattach — Holds work object attachments
pc_index_workparty — Cross-references work objects by an identifier for each party (participant), such as an account number, Social Security Number, e-mail address, or telephone number.
pc_data_unique. — Supports unique work object numbering 
pr_data —  Holds unsent correspondence for work objects [don't truncate the whole table!]
pr_assign - external assignments go here

For Smart Investigate and SWIFTNet (E & I)
============================
delete from si_work;
si_index_workparty;
research_links;
paf_work;
paf_index_workparty;
paf_index_txn;
paf_index_original;
paf_entry;
pc_assign_workbasket;
pc_assign_worklist;
pc_data_workattach;
pc_index_workparty;
pc_link_attachment;
pc_link_folder;
pc_history_work;