I wouldn't depend on the high melt wax holding your wick up. When it burns to the bottom, the priming melts anyway.Short of swtching to zincs, I'd make sure your burn instructions advise against burning it that far down. I'd also make sure that it advises keeping the wick trimmed. If the wick is trimmed and the wick tilts in any direction, it should drown out since it is anchored to the bottom.