Leave it as "Midnight Flames"; it'll leave you open to add more services as you gain experience and are able to offer more. Adding "Productions" seems to be cliched these days, and I've seen a lot of small businesses go by "Productions" and "Studios" and not get really all that much punch.
Adding a blurb underneath might be a better idea such as:
Midnight Flames Costumes - Artwork - Sculpture - And More
I wish I had my original production tag line and logo around someplace...
"Pushing the Boundaries of Creativity Since 1993."
So, just some thoughts there.
Also, remember your motto/slogan. That can really add some recognition to your organization.
My apologies for rambling, but I do hope it helps.
"I majored and marketing and psychology...I can pick people's brains and then sell to their needs and wants...then I got into theater, radio, baking, cooking, writing, and all that creative crap my parents hated...it's a good mix...kinda like a nice Ben & Jerry's Ice Cream Flavor..."
I think studios because the flames' 'S' and the studios' 'S' will make the whole thing easier to say, and it will roll off he tounge more, more verbally pleasing, also i think studios is pretty sophisticated <33
personally I think any of 'studios', ' productions', 'creations', or 'orginals' would be good. I dont think 'Art' cause...well you do other things than just art (I know art can be anything but you know alot of people will take it as drawing', and the same goes for 'Costumes' as well. I think 'Mindnight Flames' sorta just..hangs there so you would need something for the end. I dont think 'Works' would be good cause 1 it makes me think of work (something that I dont like to do XD) and 2 it almost sounds like 'Midnight Flames Works!'..as in some sort of an advertisment for some product that I need to buy.
.... this really isnt helping <<;
But I think over all...either 'Creations' or 'Orginals' would be good since that way it'll broden your horzions on what you do, and being that your work is quite orginal that sounds pretty spiffy
Midnight Flames Creations sounds pretty well! My own "brand name" is ThunderFox Custom Works (shortens to TFCWorks). A name must reflect what it works with, and in your case, art and fursuits, "Creations" seems propper