Yeah, some activities can be quite exhausting - like doing Gambit without fireteam.. ugh. Blueberries can be such interesting folk in your team. It helps if you focus your Umbral Engrams before opening them, quite often they have powerful drop inside which helps you climb up the light level. Like I had 1020 chest, focused my Umbral into Armour one and got 1029 chest out of it. Quite luck based still, but any help from system is nice.