FrogReaver
The most respectful and polite poster ever
And this is where I am pushing back from.
I fully and gladly admit that a monk after 11th level is hurting and could use some help. Some gear, some feats, something, because everything after that in the base class is really kind of just mild utility.
But, their damage is not the lowest (on average) compared to all other possible builds. Maybe it is middle of the road, but it is certainly not the lowest.
Their hp is a bit on the low side, but that is helped by some solid defensive options and their mobility which is a viable tactic to consider to help their defenses.
As for things they could get, an item that allows a d4 or d6 extra damage on their attacks would be big. I think by right around 11th level, their dice become d8's so they no longer really benefit from the staff, so getting a set of rare knuckle dusters that add that die of of damage massively jumps up their damage output.
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Also, that 20% number I dropped is getting used a lot, and out of context. Now that I am not on my phone let me post the original and my response from GiTP. To be clear, this was about stunning a beholder and how it is useful. I have changed nothing from Yunru's response
My rebuttal
Possible issue. Stunning strike requires a melee weapon attack. It’s not clear it can be used on the flurry attacks.