You're welcome. If you have any Omni oils, they can be worn with any of the other oils. Also, you may use the oil on petitions or written chants, the target's pic, or to dress an item(s). You may also wear the Omni oil(s) when conjuring/ chanting over another candle. I believe, just the Omni candles should be burned alone. Also, search Omni in the forum and look for the post by @Ife- Grow, Learn, Evolve who breaks it down for us. ✌🏾
As per the candle description, Omni candles are meant to be burned alone due to amount of energy and spirits attached.