Dennis, no real "set in stone" recipe or formula.
Alot of folks like different blends.
I alwasys like pure beeswax mixed with a little, pine rosin. Like twisting strings, you have to experiment, to find what will work for ya!
Try a small batch, a little at a time, always can remelt and add either more wax, or rosin, to get the tacky stuff you like working with.
I have a dedicated pan just to melt both with!
No real rules, just be careful melting the rosin, Hot and Flamable, best done outside!