It really is just a case of trial and error unfortunately, I don't mind giving out my settings to a certain degree for a base line, and I know this sounds mean, but why should someone spend a day at the track refining settings (which is costing money) to then just give them away to someone who doesn't want to put in the time and effort.
I could understand that being harsh if I had any links to Lrp or Nosram but I don't. And as Sean mentions, hardly anyone in the US runs boosted now.
If its any help to WTCC, Olly J uses Reedy motors with boosted here...