Your guaranteed etheric light on the 34 and 35 levels of PoE they also drop in nightfalls but extremely rare! After completing the 32 version of PoE you get an armoured core which you take to variks in the reef, that is where you exchange your armoured core for the gauntlets variks is selling! It's not difficult guys, I've now completed the 34 version twice I'm level 34 now!!