1.Theory
blades lvl8 at NPC in jg cost 3,5k of Silk Road and when they are destroyed whit destroyer rondo they have about 50% chance of giving 4 to 6 units of wind lvl2 which i hope cost's 2k each on all servers(it does on Athens)..if it does not then u lucky Athen's players listen up becouse u will find this very usefull .As i was saying lvl8 blade has 50% to give 4~6 wind lvl2, for example well take average of 5 so it gives ~10k of gold
in this exaple i will destroy 100 blades lvl 8 bought from npc in theory: about 50 blades should give me 5 units each so thats
50x5=250 units of wind lvl2=500k...nice right
Now lets see how much we need to spend on this:
we need 100 blades lvl8 which cost 3,5k each and we need 100 units of destroyer rondo so that:
100x3,5k=350k(for blades) & 100x400=40k(for destroyer rondo)
350k+40k=390k...oh look we have 110k of profit from those 250 units of wind lvl 2 alone..u get other elements as well and they have some price for example wind lvl1 can be selled for 500 Silk Road Gold each easy
In theory works fine now let see how it works in game...
2.Ingame experiment
this is where u buy destroyer rondo

theres a 100 pices i take

there is 29 blades in my inventory

ok now we do some alchemy

and we get those nice elements that cost soo much

and oops now i have no more space in my inventory need 4 spots in order to work properly
do not make this kind of mistakes they can cost...start have 8 spots for elements and4 free spots so alchemy can work now if u were dumb enought to make this mistake sell it or put it in storage

ok now we finished first round let see results:
28 blades used, 75 units gained meaning 15 blades gave 5 pices each
15 blades are a bit over 50% of 28 that was totaly used so we scored good

round two lets go same thing whit one diference i use 25 blades in this round(nned those 4 spots for first blade )

and here are results of 2nd round:

we used 25 blades adn we gained 62 units of wind lvl2 meaning 12~13 blades gave us wind which is exact 50%

3rd round (bored to death here )

and results:
we used 25blades adn gained 63 ubits same as round before this one 50%

4th and LAST round(thank god )
we are useing only 22 blades this time as that how many has left until 100 that i told ill be destroying

and here are results of 4th round:
22 blades and 59 units gained meaning we got ourselfs anotehr 55% one

TOTAL SCORE:
we used 390k in doing this and gained 259 units of wind lvl 2=518k of Silk Road Gold from wind 2 only let say u get 100k for ALL other elements( and u will get more)
u get 618k-390k=228k
it took me 25 min to do this and let asume ill need 15 min to sell it that 40 min in total.
I would like to see some1 (whitout silks) and under lvl 30 to make 228k of Silk Road Gold for 40 min