Why crafting is BS

Start with 6440 breach rings = 193.200 ex
6440 essenses * 5 = 32.200 ex
6440 fracrures * 50 = 322.000 ex

1 out of 23 gets the t9. = 280 t9 rings
1 out of 4 gets the correct fracture - 70 t9 rings
70 x 2 = 140 an * 50 = 7000 ex
get the second with chaos ~ 1 of of 80 ~ chaos = 1600ex * 70 = 112.000 ex

So you are left with 70 breach rings with 2 t9 for the mere cost of ~666.400 ex

1/70 gets the t9 you want.

70 sinistral * 10 + 70 ex

Final cost 667.170 ex or 1.934 divs for a perfect prefix only t9.