You can do that with any number. Experiment a bit, set the second number one higher. 25 26 25 gives a slow spiral draw. 90 91 90 is my favorite so far.
I like this game, but it drives me nuts that you have to play the same level over and over again to get XP. And then the skills you buy are rather lame and don't really help you with the levels anyways.
For the first epic, I focused on towers of single colors and I was able to take him out in a single pass. Then when you can, pump up dual mastery and that will surpass solid colors until you can get single mastery. The final epic I had to let him through once, but focused on solid colors with several purple towers that I moved through the path as he traveled.