Ya know.... You could just not put them in the torch flame as long. You still have to get them hot enough whether you do it slow or fast. I'm not trying to be a smart you know what..
I don't like to use candles and such as the soot weakens the bond.
With ferrel-lite or glue sticks...
I use a metal cap from an old hoppe's #9 bottle and just fill it with Methanol. Light it with a lighter.
It burns clean. The flame is about the right size.
Burns long enough to do 6 or so heads/points. When the methanol is gone it goes out.
Just don't add more methanol when it's burning.
And don't do it where if you spill you'll start a fire. It's not the safest way I know. I do it on a steel table over a concrete floor and keep myself out of the way of spills.