I don't debate opinions.
You should look in the mirror maybe? (j/k)That's very stupid...
As actualy playing Kensei Monk I can say - Who want's use longsword, when, as monk, you need DEX high as possible. When you max STR and use longsword you loose so much AC that any feat can worth.
Use rapiers instead. With DWF it's possible. Than attack with kensei weapon rapier, as attack action, than unarmed strike as bonus action and you got +3 AC and second rapier is just death weight for bonus +1 AC
For one thing, honestly, I didn't include rapiers because, quite frankly, we have not had them in our games since they beginning. Anyway, since it is a Monk weapon, you can use DEX instead of STR... Which is why I only have the longsword with STR at levels 1-2 before Kensei.
Now, you can't, RAW, gain the benefit of Agile Parry if you are making the unarmed strike as a bonus action, it must be part of the Attack action.
So, what's stupid now...? And you're actually playing a Kensei... huh...