Before Legion, it's cool to recount
If you were actually around for KT vanilla, props to you. In fact it's a testament to a poster's cred to have experienced every boss here during their relevant periods so I suppose speculation based on encounter nature is also sorta okay. Not including Raid Finder incarnations, Ruby Sanctum, and generally with the bosses at their hardest difficulties and tuning in mind but since not everyone will experience those, just regular is okay too.