A wild candlelit sex ritual between a Brooklyn woman and her voodoo priest got so hot and heavy, they ended up torching their clothes and sheets -- sparking the nasty fire that killed a retired teacher and left 100 people homeless last week, sources said yesterday. The unidentified client was just looking for some good luck in her life when she forked over $300 to the horny holy man at his East 29th Street apartment in East Flatbush last Saturday, sources said. "She had problems in her life, and she wanted them taken care of," a law-enforcement source said. "He...