[@Noob5674]

Chef's kiss to the Starling's Lore, I'd definitely use them for plot. 

More questions will be entertained later, so far you fit the criteria in background.

Artisery refers to your life skills like if you got at singing, etc. hence you need to put what you just did in Magecraft.

Gray is Second Class, given his general use of magic and keen intellect.

Put the following under Parameters:

Second Class Mage | Second Origin

As for Magecraft, yeah go ahead and make that magic you want. Use Fairy Tail wiki to know more.

Question is, is he an Enchanter or Alchemist?

While both fulfill the caster role, they're different.

Enchanter is general magic spam of intermediate spells.

Once you do all this, then Gray is accepted.

Alchemist is infinite magic power but your body/mind strains in spamming.