I'd say a broody is probably best but you don't know for sure if she will stay that way for the entire 21 days.
An incubator with a turner should work without fail for the full 21 days but then you have the humidity and temperature to monitor, which is what the broody would do.
Guess it depends on what ya got as to which to use.
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Not only that worry of them staying on them the full 21 days, but I had one that did, but when those babies started to pip, she went ballistic and blew the coop. I mean she was outta there when I opened her area to check on things. I had to hurry and bring them in to finish their hatching. First I put a warm towel on them for a bit to see if she would come back, but she just started to peck the ground and visit with the other hens as if to say, I'm back. I actually got the eggs to hatch..glad for the back up bator.