**WORK IN PROGRESS**
-- GRAMMAR CHECKS WELCOME
(i always mix up english and german grammar and im lazy with using ' )
since Kalvan said its ok with him, here again with pictures instead just links to the pictures.
disclaimer: if someone still wants to powertrip because of "no IMG allowed but we are to stupid to deactivate it for unwanted sections in the ACP" - please ST*U and just cut and paste this posting including the images into fanart for your pleasure, thx.

######
Btw: Feedback about loading times from US is appreciated since i used what i usually use, abload
.de. (Yes, im evil german AND evil "grass is greener on the other side" EU player - deal with it

)
Pls put it in Post#1 so we get the guide running, thx.
Explanation:
#1 Stats of the SAME rating are interchangeable.
#2 LOWER stats kick off HIGHER stats, but NOT vice versa.
#3 clean crapstats? wtf i still need a puri stone - why should i waste precious puris on crapstats?
#4 HOW to do it
What does that mean in plain detail?
TL,DR:
Everything on Place 7-18 falls down the cliff, because there shall be no more than 6 stats on ONE manastone. Thats how it always is.
Combining 3 Manastones of whatever tier to one reduces the space from 3x6 to 6.
So, what we want to do is use stats that are of no use otherwise instead of clean manastones.
This works because stats of the same rating switch places depending on the slot in the transmutor and is worth the hassle because lvl68+ purple items get t5, so we can do t6 clean (rather "clean") stones with 3 crap stats instead of 9 clean t4 stones = 3 instead of 9 puries.
Long version follows....
#1 Stats of the SAME rating are interchangeable.
Glorious and Hero Stats have the same (internal) rating. You can notice stats of the same value having the same internal rating if you can change the order of appearance on a manastone to your liking. If one of the stat sorts would have a higher ranking,the lower would always be on top of the list of stats, therefore the first stat on the stone. This is not the case, so they have the same internal rating. (You can see it by comparing stone#1 and #2 on picture#1. #1 has a glorious-hero order, #2 a hero-glorious order. crimson and castle ARE of course lower in rating, therefore always on top. )
#2 LOWER stats kick off HIGHER stats, but NOT vice versa.
The same way you cannot overwrite the green I stats on your weapons with your fancy yellow VIIIs, lower yellow VIII will kick off higher yellow VIII. And EQUAL VIIIs will kick other EQUAL VIIIs depending on order. (See #1)
#3 But hey, i still need a purified fusion stone for that crappy stone instead of a clean stone, wheres the deal?
This is where the fun begins.
Purple Items from Level68 and upwards become Tier 5 (FIVE) instead of 4 when used with a fusion stone.
So, your usual Sta/MP , Int/Mdef, Dex/Pdef and all the other ugly stuff you cant see anymore and would usually throw away at the NPC or burn somewhere deep into the green Is of your next weapon to save some 3455 gold from the NPC just jumped a tier.
Remember, we said these qualify as a clean stone? Good.
The catch is: They qualify as a clean T5 stone instead of a clean T4 stone or a totally useless garbage t5 stone. Of course, they ARE not clean. But they work as such, so we'll gladly use them.
Saves 2 purified fusion stones each time.
4 HOW does it work
in 1-3 we had basically the "why CAN this work at all" and the "whats in for me", now lets just do it.
Lets say you have 3 crap stats from hero or glorious.Lets say it is Defense of the Hero, Glorious Aegis and Star of the Hero.
(We take those because those are the ones from my screen #2).
Make T5 Stones using purified fusion stones from every stat and combine the 3 crap stats to a t6 stone with these 3 crap stats, just like i did.
Congratulations, you just made a clean t6 stone with just 3 purified fusion stones. (or rather a "clean" t6 stone that works the same way as a clean t6 stone).
As long as "Hero" and "Glorious" are the highest available stats in the game there is nothing else you need to know. For future stats you would need to use the same stats in the new version
The simple method (and safe):
6 stats you want to use on 6 t5 stones. Make 2 t6 stones out of them and add a third t6 stone made out of 3 t5 crap-stats.
The important part is: You need ALWAYS to have your good stats make a row. You know the game "Connect Four" ? Make it "Connect SIX" (or five, if you have a stat already on the item). As long as as you can make your good stats to a row of 6 everything is fine, even a crap stat can be mixed into it, as you can see on my screen.
in text:
good+good+good | good+good+good+crap(even +crap+crap for 6 stats on one stone) | crap+crap+crap = can be sorted to have 6x good and 0 crap , see my screenshots.
good+good+crap |
good+good+crap |
good+good+crap =
WILL NOT WORK
good+good+good | good+good+good | crap+crap+crap = works and is the safest way ofc. but costs some more puries each time your still using stats that just make t4 stones, like crimson/bunker/castle - look at the screenshot ;-)
Can you see the difference?