Menthol does not give throat hit in the sense that we're talking about throat hit. The way some talk about throat hit here seems to refer to any sort of sensation in the throat or lungs, be it cooling or warming or whatever, and that is not what I would consider throat hit.
Properly, throat hit is that momentary clenching feeling right around the trachea, a strong but brief burst of sensation that is completely independent from the effects of the sensations attained from menthol or cinnamaldehydes or the like. It's provided exclusively by the nicotine in regular juices; if you get a juice whose flavour you feel has throat hit, but get it in 0mg nicotine and vape it, whatever effects you get from that nic-less juice are not part of the throat hit we're talking about. And no, in my experience, PGA (or vodka) do not give or even boost TH to any significant degree, at least not in the concentrations typically used for such; they only give a warming sensation some might be calling throat hit, but which does not qualify as far as I'm concerned.
It seems to be difficult if not impossible to replicate the exact feeling of that throat hit, which is why I'm experimenting with different formulations. So far I've tried (and flunked) Throat Hit Plus from The Vapor Pros, which seems to rely mainly on PGA, but which simply doesn't work at all, especially at the levels they suggest you use it at. Next will probably be Flash, followed by Diablo Loco, and then maybe some experimentation with blends of two or all three to see what experience that provides.