Wow, 10K in the center is alot of rear diff drive out of turns!
But, what works for one may or may not work for another.
I always like 5-7-2 front to rear. The most aggressive i've ever liked is 5-7-5, but it's a little loose under power in mid turn, good for turns you need to bring the back around in to be fast.
Over bumps I find the lighter the diff oil, the better, but the trade off is less accel for big jumps and more frequent changing of the fluids. It still works great if you have very good throttle control, but if you like to "pin it" when you see daylight, may not be a good idea. LOL
...Jim
W.E.D.