Does Superior Wizard Oil increase healing?
This does increase healing as well, tried and healing went up 42 pts.
Does Brilliant Wizard Oil give healing?
You can test it. Cast a hot, observe the ticks, use a cheap wizard oil and then cast the same hot again. If the value has increased then it does improve healing too. Plenty of people in-game and apparently on reddit confirmed it adds +healing aswell.
What is Wizard Oil?
It was made of 50%-70% alcohol containing camphor, ammonia, chloroform, sassafras, cloves, and turpentine, and was said to be usable both internally and topically. Traveling performance troupes advertised the product in medicine shows across the Midwest, with runs as long as six weeks in a town.