TQ gasket advice

I have seen where some people run two gaskets under a TQ to reduce the heat
transfer from the manifold. I was planning on running a 1/4 to 5/16 gasket on
mine but was wondering if there is any advantage to running with two thinner
gaskets rather than one thicker or is that just personal preference? I also see
that there or open gaskets and ones with 4 holes is there an advantage to either
type. I believe the original ones were open throat as apposed to the ones that have
two large and two small holes.?