I have a similiar set up - mostly stock with MIP CVD. 12020 with 8xl on 12 cells. I just set it up and it will fly! I haven't raced it against others, but there is simply no comparison to the titans.

I would recommend a strobe slipper (you will need an OFNA 51 tooth spur) and steel idler gear(s). There are two in the transmission (low and high gears). I rarely use low gears becase it just flips the truck over, so I did not put one there.