the trick to using a "oil burner" pipe without burning your spice is a art all in its self. you must play around with the distance you keep the flame from the bulb to keep the heat just right and you have to incorporate twisting the pipe back and forth to swish your melting crystal around in it so that you wont burn the bottom. if you are able to get the art of smoking from a oil burner down without burning it, you will find that its the best way to get the purest cleanest hit from your spice.
hope this was useful information to you and good luck
oh and a little heads up if you are not aware but "oil burner" pipes are widely and commonly used for smoking methamphetamine and the police know this pipe very well. DO NOT get caught with one of these on your person. ESPECIALLY if there is spice resin in it, you will get bent over by the law for being a tweaker and it wont be pretty. so just keep it somewhere very safe