Hi Friendly! I have a question that will be interesting to budding wizards in Celestia.Heya! I wasn't sure on the answer to this so I logged in and tried out different types of attacks on different Star and moon creatures. What I found out was that the resistances were exactly the same: Ice and storm attacks are boosted, Fire attacks are resisted (as you suggest). It also appears that the other schools of magic are neither resisted or boosted.
What schools do the Star and Moon creatures resist? I'm Fire, and they resist that. What other schools do they resist?
It seems like the Fire school got the short end of the stick, but luckily a boost is just a prism away for the fire school. (too bad a lot of their damage is done in DoT spells . . . that's just really difficult to prism)
In general though, resistances seem strange in Celestia. Sometimes you can be fighting a boss and they'll surprise you. A good example of this is Unimatus in the Stellarium. He's flagged as a Myth boss, yet Death boosts against him.
So, Your mileage may vary, and I am interested in hearing from readers' experiences with resistances in Celestia.