As with any project involving adhesives, the bond will only be as good as the surface preparation.
When I do mine, I thoroughly degrease with acetone or laquer thinner, rough the surfaces to be bonded, then degrease again to remove any dust or grit.
(burning out residue in a ferrule can't be done... it just leaves burnt residue)
I like to use a combination of three or four sticks of brown hobby glue with one stick of Ferrultite... you get the improved tack of the Ferrultite and the shock absorbing traits of the softer hobby glue... and it's frugal.
I heat only the point being careful not to get blades on broadheads too hot. An old timer told me when I was young that heating only the point allows it to cool and shrink down aroung the taper.... not sure how valid that theory is, but it has worked for dang near 50 years.
Rotate to spread the glue evenly and quench in cold water.
Like I said, it works for me. Epoxy has it's advocates and that's fine with me.