I am confused to as to what you are getting at. You start out by saying how insanely expensive it is to tier but then step 1 is to make it more expensive. Step 2, again, additionally more expensive. I think you are making an attempt at shutting us p2p down on getting ahead of f2p. All while thinking this is going to help the f2p. It in actuality is making it more difficult since f2p have to still use transmutors that cost phir tokens. The more it takes to create something = the more it cost to make that something. You have actually came up with an idea that is going to make it even harder for f2p to tier up and haven't really hurt us p2p.
Not trying to hurt anybody here, actually. Increasing the stones required per transmute while simultaneously dropping the pfs price is there to make steps 3 & 4 less lucritive than they would be under the current setup.
Going from 3 stones to 5 stones per tiering-transmute while dropping pfs cost by 50% would actually make the process CHEAPER.
A successful cash-shop game is one that uses the cash shop to make an otherwise f2p process change from tedious to fast. Currently, the cash shop takes chronologically unfeasible acts (i.e. clean statted t6 gear) and makes them possible. My suggestion would take the statting/tiering process for a f2p person (outside of heavy AH usage) from nearly impossible to possible, although tedious.