You're going back and forth on yourself.

You just said
mnk was definitely number 1 choice for tanking in all of those events.
and just flopped back to
but mnk was shit at endgame in general
So again, I ask. What are you basing this on? Because as it is now, you're not making a very good point, lol.

Define all the activities you consider "general endgame", the most efficient method to do that event, and why mnk was not a effective in the execution of that strategy.