Having in mind that I might not fully understand your post...
I'm not a "virtual" Honda (wtcc) driver, nor am I an experienced driver in Oschersleben, so I can't pin point for you a setup for it.
My only "general" advice is for you to have a look in the on-line setups as there should be some.
Do a few laps with default setup. Then try different on-line setups and see the differences in car handling/speed and corresponding setup options used by those setup creators. Then do you your own setup to your like (kind of mixing them all). Of course, if you are lucky and find one that really suits your taste, then go for it.