making it plus 3 is the easiest
make it plus 1 without lucky powder
if it works with first weapon elixer
try +2 with a lucky powder
if it works try again (+3) with a lucky powder
if you are lucky, the weapon will be lucky and you will get a +3 with only 3 weapons elixers
if it fails after +1 you will lose any + already done
and you have to start over
i would not waste more than 12 elixers on a d3 sos weapon
but you may do more if you have the elixers already and you dont mind using them up
