I tried this out with my mono-aether deck feat. SoGs and in 90 minutes I got 16 mastery wins, 8 normal wins and 3 losses, adding up to a total +1477 coins (not counting money won through spins and selling cards I won).
I'm a little surprised by the results as I would have expected to be faster than the rainbow deck, but to get less mastery wins...
I think you could even do a little better with the deck, as two of my losses solely came from play errors on my behalf, on the other hand I played faster than I normally do, so that's only fair, I guess.
/e: btw. @getawu, there's no need to subtract the 'costs' of entering a battle from your total winnings, you get them back if you win.
[edit by Delreich] Broken attachment removed.