Having a great safety is key and an assistant. If your area is clear enough presoak all of tools in a mix of white gas and lamp oil. Make sure your safety can keep a good line on them though. Or if you have a great assistant they can lay one out for you and you can light it and have them take it the used one and put it out with the safety. You can even have your assistant use tongs of some type to pick up the flaming tools and wear fire gloves and this increases the amount of drama and adds to the element of danger and there is no break in your act. Careful, careful careful...as I am sure you know, fire spinning is tiring and taxing so make your shows short and sweet. Do your best tricks and put in breaks in the music that will allow you to slow things down. Stop often and smile at the audience and let them see those flames when they are not spinning and breathe while you do so esp. if it is hot out. Never try to do a show without a trained safety, there are too many unforseen what ifs.