Can we Settle this once and for all of what is going to end up netting us the most cash?
Lets base it on 5 characters (I have more so i will just times this by 2 others that have more do the same 5 is just a good jumping off point.)

Transmute Truegold
Costs (as of right now on my server 12 /29/2010)
Pyrium Bar (3), 50 G = 150
Volatile Fire (10), 18G = 180
Volatile Air (10), 35 G = 350
Volatile Water (10) X 17g = 170

Total cost for one truegold = 850 1 Truegold sells for 1000 on my server so that is 150 g per char per day
Assume that you are proc spec lets say that on the average you proc 1 extra truegold a day thats pure profit (out of your 5 characters)

750 (150 * 5) + 1000 = 1750 profit per day.

Life to air
15 Volatile life X 10 = 150
Volatile Air (15), 35 G = 525

525-150= 375 profit
lets say again you proc one time for one of the lessers least amount is Water or Earth for between 14-17g so lets just say 15 for easy math
375*5=1875 + 225 = 2100 profit

2100 - 1750 = 350 gold bonus if you xmute the airs. per 5 characters. or 70 gold extra per character per day.

What really screws this up is if you proc 3 or a 4 on one character.. So what does everyone think?