I was only planning to use the epoxy on the wedge
I put the ax head in a vise with the handle vertical, have handle eye portin covered in epoxy, then inset into ax eye from the; bottom. If wood not a good seal, smear some clay to close any gaps, Then fully fill any space between head and handle, including the wood wedge notch.
Drive in wood wedge, let cure. Remove slop, file or grind part of handle that extends past head, add metal wedge (typ 1" by 3/4" size wedge.).