Alternative for Audit log table

Hi- is there any alternative for UNIFIER_AUDITLOG table? Or any way to optimize this table?

I found some of the below tables:

BP_AUDITLOG - Doesn't show any data
UNIFIER_VIEW_AUDIT - show almost similar as Unifier_auditlog (except audit for integration user token generation)

Our requirement- for some reporting purpose we need to look for Unifier_auditlog table, as this table holds audit for every event/activity within Unifier, query becomes very slow.

As our main requirement is to look for audit of BP.. is there any separate table which stores audit only for business process activities?