First - Take out your money from the bank, then buy all you can of the following at MAX PRICE:
Emerald bolts
Not the (E). Then equip your air staff with your Natures and your Cosmic runes
Each enchat will give you 27 mage xp, and 10 enchanted emerald bolts. So there's still a profit. A Nature and a cosmic is about 500gp. Now times 200gp X 10=2k.....1.5k profit.(Because your supposed to sell your Emerald Bolts (E) for 200gp each)
Now, since you spent alll your money on the Emerald bolts, you may run out of Nature ruens and Cosmic Runes. So here's what you do. Sell your CURRENT Emerald bolts (E) then buy the nessary or more Runes that you may need.
I bought 14k Emerald bolts. For 1.6mil
Then I bought 1k Nature and 1k Cosmic Runes. Then I started enchanting away.
Now, I just spent 300k on the Nature and Cosmic runes. And I sold my Emerald bolts (E) For 200 gp each.
Now, I got about 9.2 mil. - 300k? = 8.9mil!!!
Keep on doing it, and you will get 16mil! And so on!!

(Unless the prices lowered)
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Katie is cool.(And owns)