This solution gives you 75% rate.
Lets say you have a lvl 80 unique helm,and you'r lvl is 80 (should be same lvl but less then 30% at the lvl xp bar) should take you MAX 5 red's to make the helm elite.
From my experience:
At lvl 88 made my elite+12+soc brace to super with 1 red,i was same lvl and 20% at the lvl bar.
At lvl 91 made my elite+12+soc boots super with 3 reds.
At lvl 92 made my elite+12+soc blade super with 2 reds.
Next lvl at lvl 93 going to make super the socketed+12 armor ,at lvl 99 the +12+soc helm,at lvl 101 the +12+soc neck.
Wish me luck to do that with less reds
:Edi:
To make a weapon is hardest,could even take 10 reds or more






- level upgrade (WITH NORMAL STONE)