mystical mushrooms work for infusion stabilty? ......... i spent all that glowstone for glimmering flowers when i did not have tooo ....If you mean the thaumatorium ash, yes anything that heats a cruicible works to heat that.
If you have botania, pylons of any variety, mystical mushrooms (any colour), and glimmering and floating flowers (but not functional/generting ones) all count for instablity reducton. If you have both a botania flower farm and a mushroom farm, mystical mushrooms are very cheap to use.