This is what I do,,,,,,,
If you use REPCO torx not sidcrome or kingcrome (repco is stronger in torx) you can take the torx out of the socket with a hex key. then get a kingcrome Impact Driver (cheap I paid $22) and the torx will fit it.
I to have tryed heat but had no success it only heats the head and makes it easy to strip the torx but that was with an oxy, I think Lexx maybe onto something with the heat gun as it only worms it with a moderate degree of heat.
Anyway I hope I helped
