The phrase "comes to snuff" is not one with readily identifiable antonyms, as it has a specific meaning relating to meeting one's end or downfall. However, one could consider antonyms for the concept of meeting one's demise, such as success, winning, thriving or flourishing. Alternatively, antonyms for the literal meaning of "snuff" as in the act of extinguishing something, could include ignite, light, kindle or spark. Ultimately, the phrase "comes to snuff" is a unique expression with a particular meaning, making it challenging to find direct antonyms for the phrase itself.