Cant keep the front end down

[RC-Monster Mike]

The 12 tooth is about perfect for your setup, I would imagine. Going up a tooth may be alright, and would help keep the front end down, but only a little bit! 14 good cell will lift the front end almost no matter the gearing-at the expense of your electronics! If the temps are pretty safe, you could gear it up a tooth at a time to see how you like it. You could also back out the slipper and adjust the acceleration curve(on your radio, or on the controller itself if you have the programming cable and software).