I have just today run several tests on both Mahogany and Zebrawood, On the piece from Ace Hardware, one pass at full power 160 zooms it cut in one pass, The other two pieces did not cut through but burned. Given that Mahogany will burn when heated, and a little char will lead to more, having a great many passes IMHO is a losing game. I am not sure you can keep the smoke from burning as even at 300 zooms it will flare. what you can do is reduce the effect of that flare at burning where you are not cutting, as once a coal gets started it tends to continue,
One way to do that is a strong masking that will keep the flare away. If you are engraving however that does not work. In that case, I did multiple engraves (like 4) but soaking the wood with water before each pass. As long as the wood is wet the flare will not burn it, but the cutting point is so high it has only the slightest effect on the cut.
I have long thought that if it came down to it dry ice in the crumb tray would lower the oxygen content and prevent burning, but I have not been desperate enough to try that yet. When I use up the mahogany I have I don’t think I will be buying more. Zebawood is similar but not quite as bad.