The way we were taught is that the Hanna tests are the ones you're supposed to use. I have posted below a very quick outline of the Hanna tests that worked well for me. You obviously still need to know the other cases to make sense of the Hanna tests, but this is the framework for analysis that I used on the exam.
B. Hanna Tests Outlined
(1) If there is a Fed. R. Civ. P. that is on point
--Is there a conflict between the Fed Rule and the State Practice?
--If no, the court can apply both with no problem
--If yes, is it constitutional and in line with the Rules Enabling Act? (Doesn’t abridge, enlarge, or modify any substantive right)
--If yes, then use the Fed Rule
--If no (it DOES abridge, enlarge, or modify a substantive right), then use the State Rule
(2) If there is no Fed R. Civ. P. on point
--Is there a conflict between a Fed Practice and State Law?
--If no, then it’s fine
--If yes, then does the Fed Practice encourage forum shopping or result in an inequitable administration of the law?
--If no, then use the Fed Practice
--If yes, then use the State rule unless there are substantial federal countervailing considerations (ex 7th amendment)