One thing i am a huge fan of is NOT trying to be fair for an encounter
but fair from power / connections / opportunities over time.
So character X meets B.G. witch, and "the witch" uses the voice on the the other =>Non-con. (This is free form no system). The BGW does "god mode the other" (as long as its not fatal), but LATER in subsequent posts I will give the character that was "overwhelmed" or at a loss during that time some ace. (Finds something super good, befriends someone powerful that had the same thing happen to them, they devise anti BG plots and have some powerul allies ... House Ix for example.)
So encounters are one sided, ie each writes plot / god modes, but balance does happen, over time.
If anyone wants to be a stage 3 navigator they can, Im not going to rule out anything, as powerful as they are they are limited in many ways logistically.
Also being part of the royal family (say the empress' daughter is OK, but she is very limited in things she can do, she is powerful in one sense but far from free to run amuck.