I don't what kind of nikkas you fighting but series reach disadvantage could get you marked. A dude I was friends with in high school got into it with some knuckle head. My friend was 5'1 the other guy was 6'5 my buddy needed to get his surgery to fix a broken eye socket bone.
We all got stories like that, most that go both ways. You are making a definitive statement as if height and reach trump all. That is not factual.
I will grant you this; A skilled fighter who is tall has an advantage over a skilled fighter who is short. But to boldly say that "reach and power" is the only thing that matters is beyond ridiculous. You can have reach and power but have no coordination, no speed, no balance, no chin, no footwork, no vision etc etc.
I'd fight 7 foot nikkas all day if all they brought to the table was reach and power lol.