This information is outdated by now, it was however a great path when I was aiming to hit level 10
I got the components of the market mostly.
the easiest formulas at this point to level are:
from level 1 to 3:
Formula 1:Orb Aggregate - very cheap, just time consuming.
from level 3 to 4: - This is trap point 1.
Formula 3: Fausto's Bottle - very easy to make, very hard to get your hands on. somewhat cheap
Formula 3: Sundae's Treat - hard and expensive
Formula 3: Fondue the Chocolate Bunny - hard and expensive
From level 4 to 5:
Formula 4: Sibyl's Incantation - hard and expensive
Formula 4: A la Fondue - easiest one at this level
Formula 4: Cupcake Confection - easy but expensive
There would be one cheaper option but it takes a lot of time, this one is: Formula 4: Black Neko Cosplay
From level 5 to 6: - This is trap point 2.
Anything you can get your hands on that uses swatches.
From level 6 to 7:
Formula 6: Queen Bee - easy but expensive
Formula 6: Geek Chic - hard but cheaper
Formula 6: Albus Egg - hard but cheap
Formula 6: Atrum Egg - easy but expensive
Formula 6: Princess the Piglet - very easy but also very expensive
From level 7 to 8:
Formula 7: Grace Meow. - very easy but somewhat expensive. also a good formula to make some profit.
Formula 7: Maneki Nekomata - easy but expensive
From level 8 to 9:
Formula 8: Solar Mage - expensive
Formula 8: Creeping Vine - expensive
Formula 8: Draco Lado - expensive
Formula 8: Edmund Companion - Easy but expensive. You can make a profit of him.
You can also stick to Formula 7: Grace Meow at level 8, it just takes a lot of those to level
From level 9 to 10: This is the final trap point
Formula 9: Moira Companion - Easy but expensive. You can make a profit of her.
Formula 9: Louie Companion - Easy but expensive. You can make a profit of him.
Formula 9: Padmarvati Lotus - Medium and expensive.
Formula 9: Vittoria's Intimates Medium and expensive.
Formula 9: Noel's Gift - Hard and expensive.
Formula-10: Crown of the Thrice Great - Very expensive
Formula 10: Case Meow - Easy and cheap.