i feel like makima is jus supposed to be psychologically scary which is why even tho shes a devil she can still look so human ... domination isnt scary upon first thought obviously but the more you think about the concept of "domination" and "control" the scarier it becomes which is literally just makima..
Just to clarify.... Makima was overpowered by the Dark Devil and had to escape... So, no; she is not stronger than the Dark Devil.
And it was clearly stated that the Dark devil was one of the devils that never died even once and these devils were far stronger than the Gun Devil, so it wouldn't make since to even hope for an inferior devil to defeat her if a superior one couldn't.
For those of you who aren't in the know. What Fujimoto did was, he grabbed the phone book of his home town and started writing in the names. That's how he got so many names.
This translation is off all the time, especially the grammar, in Japanese it's Shihai (no akuma) which translates to : rule; control; direction. Basically like the Demiurge in Gnosticism, a being of tyranny and oppression. A fear of losing autonomy