Bungie Team, please check my account and you will see have have several runs on Master level for the Thrilladrome and received no exotics at all. Additionally, if you check my account for last week you will see again several runs on legendary level and still no exotic. Listen, I don't complain about a lot but i've been getting robbed of high state armor i've been farming for. What is the deal with the Lost Sectors?
You do realize the chance of getting an exotic is like one in three or one in four chance right?
You are not guaranteed anything.
Just do legend as it's faster and the difficulty increases not worth it.