Hi,
The craft will have a ilvl = (ilvl+clvl)/2, so even if the amu have +2sk (ie ilvl >=90), if you craft it with a char that has a lvl <90, the result will not always allow +2sk :/
As said above, gamble+craft at clvl 93 for being sure
If any other question, read this first :
https://forums.d2jsp.org/topic.php?t=30598890&f=87