Good Question. I don't consider Pr, EM, In to be mental stats. In my opinion they are more closely related to the characters psyche. But, for the core RM point of view I would say Pr, Em, SD, In in that order.
As for the HARP observation- no not really. I have thrown together levels 1-3 templates for fighter, thief, mage, etc. for week-ending and the pre spent the DPs for each level then I. So, a first level fighter would have +20 in a primary weapon skill, +10 in a secondary weapon, and +5 in a tertiary weapon, +10 body development, +30 armour- basically ignore the ranks and express it as the actual bonus.
Then, advancing to 2nd level you could add +10 to a weapon, and +5 to another, +10 to body development etc. Really, I guess it's closer to Hobby Ranks from RMFRP- but, keep in mind I am doing this because I am running pre-determined storyline that I have a good idea what skills the PCs will need. We are sacrificing a lot of customizability to maximize the time we get to actually play.