I'm not sure if this mnemonic will be helpful for anyone else, but right now I'm trying to use:
there's nothing DREARIRR (say "drearier") than scope disclosures.
Reserve items in opinion
Evaluation of data for reasonableness and consistency
Accounting basis for reserves
Intercompany pooling (if applicable)
Reviewed reserve setting methods and assumptions
Reconciliation to Schedule P
I like "reconciliation to Schedule P" as the last R since it comes back up on its own and so it's more obvious when you've forgotten an R.