Can anyone link me to a Rawr for Dummies equivalent?

The information on their site isn't doing it for me and my search hasn't come up with much. This is mostly for a geared out holy priest for the record, though I will probably use it for my pala/mage/huntard too. I tried to set it up myself and it basically told me to change all of my gear for regen emphasis, even though I'm almost entirely set up for throughput and I have no mana problems -_-; I'm pretty sure I'm doing it wrong. I only really figured out how to load my profile and see which upgrade sources to consider, and evaluate via the optimizer. But I don't know how to look into where it's getting the weights, AKA why it's telling me to gem all intellect and drop significant ilevels just to pick up more regen.

Halp?

When you have your priest loaded up in RAWR, hit the Options tab and make sure your role and fight length are configured properly. It may be weighting regen too heavily because it thinks you are doing more healing than you really are.

I use RAWR a lot, but I never use the optimizer. I feel like I have a good enough grasp of what I need (like you seem to) and I just use it to compare my gear to potential upgrades and see the calculations for casting speeds, burst/sustained healing potential, etc., under raid buffed conditions.