Master and Legend LS are a great addition to the game, allowing us to hunt down a specific exotic armor piece in a narrower loot pool. Having said that, I want to share my experience with master lost sectors. - attrition modifier: I am forced to use certain exotics/loadouts because the enemies do not spawn enough wells of light. Alternatively I have to wait a minute for my health to regen or die to get my health back. - exotic drop rate: In my experience the exotic drop was about 25/30%, which is too low considering you need an average of 7-10 minutes to complete a run (assuming you are high enough power). On legend difficulty it takes 2/3 minutes and the drop rate is about 15%. - champions “synergy”: This was experienced mainly on “Exodus Garden 2a” where there are a lot of enemies (+attrition) and the barrier servitor gives immunity to the overload captain. Most of the times you have to wait until they move away from each other. In conclusion, I would rather farm any LS on legend difficulty because they are way faster and fun, while still being rewarding and challenging. I have 2 quick suggestions for master LS: buff the drop rate or rework the attrition modifier. I would like to hear your opinion on this!! TL;DR - Master LS are tedious mainly because of attrition. Legend LS are almost as rewarding while still being fun.