Regarding policies, Okta recommends:
Solution: To have one policy rule per application, as more will most probably alter the behavior too much and you may miss important behaviors
Which is a / are best-practice(s) in a SAML 2.0 situation?
Solution: To not use SAML 2.0 and Provisioning via the same App instance in Okta, but integrate the same SP custom domain via two different app instances in Okta, one for SSO, via SAML 2.0 in this case, and one for provisioning on users
Which is a / are best-practice(s) in a SAML 2.0 situation?
Solution: To not link your admin user from the SP via SAML with a user from Okta, if the app (SP) does not provide a SAML bypass URL