How many stones do you usually end up buying before you find three matching ones? How much does each stone cost?
I can usually find three matching stones on the AH for an average price of 7k gold each. If you're spending more than 21k gold to get three matching stones, you'll be better off just using the AH.
I'm not sure what you mean - are you ripping the stats off your quest gear for transmution? IMO it's a waste of transmutor charges and fusion stones to put anything but the best stats on a piece of gear. With the process I described, I can wear my transmuted gear up to and beyond level 30. I started transmuting gear for my R/K when she was at like level 13, and she's level 29 now on that same gear - and I'm still two and three-hitting baddies that are three levels above me.
These really are both the same topic, and not really ment to be argued seporatly. I just take a different road then you take. ME personally I just use quest gear as I progress around level 35 is when I start stating my gear because before then it really wasn't needed, the basic quest gear was more then enough. Since I am reguarly restating gear about every 5ish to 10ish or so levels it makes more sense to me to keep a stock pile of fusion stones so that I can redo my gear. With that logic I only end up buying a few 1 or so fusion stones till I get a match of 3 of my existing fusion stones. Sometimes yea I end up getting more then just a few but by that time I've already gone through most of the fusion stones I have, sometimes it's just 1. IF fusion stones were ONLY 7k each I would have a different stance as it is now on my server more like 21k each!!

Which is why I do the method I just said.
As to charges, well I never had a problem with them. I use the tokens from daily quests and turn in 300 at a time in the CS so that I get a ruby in addition to my 10 charges. Anything that can be offloaded to an alt to do the transmute does get offloaded to a disposable alt to do the transmute. This also saves charges in the long run, espically when you start talking about tiering weapons.
So in short, let's agree to disagree. I am not knocking what you're doing if I could get great prices on the AH for fusion stones I would do it that way, since I can't I do it a different way. Neither way is wrong, they are just different.