For mohawk maintenance, I usually do initial hacking with scissors to get it back to roughly the length I want, since it’s faster for me & I don’t need electricity or batteries.
Then if needed I do touch-ups with the clippers – if I want it neatened for a competition, for example. I don’t use a comb, I just eyeball it. I only took it all the way down to crest once, then all the years since I have left an inch or two of mohawk. So there is always a little wiggle room if I need to even something up. I put my hand on the far side of the made & run the clippers straight across perpendicular to the neck into the palm of my hand to get an even cut across the top. I do this from both sides since there always seems to be stray hairs on one side or the other.
In blanket season, I do cut the section on the withers all the way off since it’s constantly smashed down anyway.
It does grow back fast. When competing I was trimming it at least once a month, I maybe do every 2 months now. Although my horses are always on a hoof supplement since I have a knack for picking creatures with high maintenance feet, so that grows hair a little faster.
I can’t think of any reason I’d go back to mane-having. Youngster does have his mane right now because I want all possible grabby parts available, but I still keep it trimmed short with scissors.