[Psientist]

It's not impossible - a year ago I did a statistical regression of all default pretenders, and the degree to which each attribute added to the cost. I developed a spreadsheet which allowed you to come to a consistent ballpark figure, it's in the "tools" thread somewhere, or the Forum history if you search for it. IF you can't find it after looking, DM me.

I use the spreadsheet for my own mods, which have lots of pretenders and which hold up pretty good for gameplay balance.