Fast - 1 layer of Vauhti regular Blue, 1 layer Vauhti Speed Violet
Faster - 1 layer of Vauhti HF Molybden, 1 layer Vauhti HF Violet
Fastest - 1 layer of Vauhti HF Molybden, 1 layer Vauhti HF Violet, Zero Fox Powder mixed with Medium Gel
Structure - If you want that "extra" speed, the 0 to -10 Red Creek structure tool has tested well the past few days.
Please note that this is just a guess based on today's testing and weather forecasts for tomorrow.