Ok, so I'm not too sure how many of you are familiar with this... but never light a candle and an incense at the same time. I did this while under assault. I used the incense to clear away the negative energies and I programmed the candle to burn off attack force. When both were lit simultaneously, the attacker gained a huge dark magic advantage over me.

Another thing I did was offer earth (rocks/sand), air (incense), water, and fire (candle light) to the all to degenerate attack forces composed of the elements. But whenever I offered incense and fire at the same time I got screwed over by humongous black magic invasion by the attacker.