Etheric light is better spent on: Making a nice stack in your vault to look pretty, lets face it murmur's gimmick of having 2 elements stopped being relevant when shotguns got buffed, 1 arc and 1 solar shotgun will out perform murmur in basically every situation, not to mention its only 1 more space, which if you dismantled murmur would be taking up the same amount of space as a murmur with a good shotgun to actually kill stuff with.