The tip would be hot ..maybe you could rig it so the lighter is on a weighted stand not having to hold it in your hand...

Just push a button lean forward and vaporize ..

I think the best portable hot air  heat gun would  run on  electric with a long cord...

Because electric vaporization would not transfere any negative  taste into your pipe...

Ive read that some people claim   a butane heat gun can leave a taste in the pipe?

not shure it thats true.lighting should only take a quick 2 to 4 seconds...

Electric vaporization would be the cleanest...i think..