oh thought you were one of those guys who were just like "tell me the BEST EVAR SETUP!" type of poster. Sorry! hehe.
Anyway. I've played with roll center a bit and after adjusting it here and there my chassis was at it's happy spot with ~30mm of height in the front and 15mm in the rear. When I had it at about 50mm of adjustment I would get sudden understeer through corners, which could be due to the shocks bottoming out, or just too much roll center adjustment vs the rear, or in other words the front being too high vs the rear.
You can tell in the picture that the pivot points of the LCA is pointing up, significantly increasing roll center height.. This was with ~50+ mm roll center correction. I'm sure the car would've handled mo-betta if I had more adjustment in the rear, as the rear arms were still angled down, rather than up.
So going back to your question, it is highly unlikely that you'll find a solid answer; all things (sway bars, suspension settings, springs, wheels) affect roll center among other things.