A 20t on your 2200 is going to give you some insane top end, is that much speed needed? My friend runs a 16t on his 2200 and it is stupid fast. Im geared 18/46 on my 1900 and it just barely tops out on the back straight.

As far as the diff oils go, thicken up your center to 7000. It will help with gaining forward traction. I run 5-7-3. The 3000 out back will also decrease some of the push your getting right now on a high bite track because the 3000 will help the rear end and get some more diff action going for you, allowing you to turn tighter.

Give that a try and let us know.