Nail and Glue 5" wide Engineered Floor?

I will be installing Mirage 1/2" thick, 5" wide, Mirage Maple Engineered floor over 3/4" OSB Subfloor.

I've read that for 5" wide it is a good idea to both nail and glue. The flooring is expensive so I don't mind spending a bit more on glue if it will make it more solid and less likely to squeak later.

My questions are (assuming it does make sense to both glue and nail):

how much glue is needed? I've seen examples where a snake pattern bead is applied to the back of the floor before it is set in place and nailed.

Do I need a moisture underlayment? It seems is though that would not be ideal if I am using glue as wouldn't I want the glue to be connecting the OSB and flooring?

Thanks for any help you can provide.