In my experience - baring in mind I have stock on the 133 - is start with a middle point (I presume they are click adjustable - so say they have 12 settings go for middle being 6) and work from there.
As you say there is no "right" way of doing it for road. Where as I would probably go for 4/5 out of 12 where I live (which would be hard enough due to the city roads) you may live somewhere with smoother more enjoyable roads and go for 6/7.
Even if they aren't click adjustable (I've had spanner ones before) apply the same principle.
Of course as you say it's all subjective so just have a play and go with what you feel is optimal for your situation. If the rear is skipping charges are it's too hard set up. If the front is giving understeer, same again. If the back skips but front is fairly grippy adjust the backs to softer and see what happens.
It'd be good if you could stick in on a computer like tracking and get it done "correctly" but unfortunately (unless you are Ferrari or the like) it's not possible. Tracking as a general rule, is either correct or not. Dampers...well you get the idea.....
Hope this helps bud - if you need any help at all let me know and hopefully we can come up with the best combination of handling and driveability. I can also help with camber if you intend to play around with that and also if they are going to be posh dampers with recoil/damper.
Al