You know, I hate to say it, but a tyromancer sounds to me like a basement-bargain type of wizard...
"Bob Mclackey, have you hired a magic user for me as I ordered you to?"
"Yes, oh great Baron Rupert the Frugal ... mostly..."
"Mostly?!"
"Well yes, your highness. As you recall you strictly limited to a 300 copper piece budget..."
"Yes, a small fortune, but well worth it to have magic on our side!"
"So ... erm... the pyromancer didn't want to work for that kind of money. Neither did the transmuter"
"What?!? Those greedy fools! But surely there are more than 2 magic users in the realm?"
"Yes sire. But the druid wouldn't work with the nobility, and the clerics consider you impious"
"Those stuffy, arrogant swines! Go on now"
"And as your majesty must concede, it wouldn't be proper to consort with a necromancer or a witch"
"Granted"
"The abjurer left town, the diviner said it would end poorly and the alchemist accidentally blew himself up three weeks ago... so..."
"Yes? You did get someone? Surely not a warlock"
"Oh no sire, definitely not a warlock! And yes I did find a magic user willing to work for your price"
"And?"
"Yes sire?"
"What kind of magic does he-"
"She sire"
"She use?"
"Tyromancy sire"
"Tyromancy!?"
"Yes sire"
"And what kind of magic is that, Bob McLackey?"
"I believe it has to do with cheese sire"
"Cheese?"
"Most definitely sire"
"So we have a cheese wizard?"
"Apparently so sire"
"... it will do".
And so Baron Rupert the Frugal, who never spent a gold crown when a copper would do, hired the greatest tyromancer of the land, and his enemies quivered in fear at the thought of meeting his cheesy wrath.
(edits: typos, grammar, slight clean up)