Master lost sectors are the same. I've just done 10 master lost sectors some flawlessly & got 0 exotic engrams. It States IF SOLO - Exotic Head Armor (Common) Enhancement cores (Uncommon) I call BS I got Zero exotic engrams to drop but got 10+ enhancement cores & glimmer. . I'd like to know what Bungie's description to common is. Perhaps they need to look it up in a dictionary!
Ive been getting exotic i do not have on the first try yet with raid or dungeons i mostly get way more armour than i do weapons.