In my opinion it takes damage nicely. By that I mean if u play ur cards right you take small shots hesr or there but a good concentrated shot will still kill a 84. But if ur shots are out of convergence or an extreme deflection u will cause small damage.
Ussually that damage is more debilitating then u think. A stuck flap. An oil hit. A pw. Even the loss of an aileron limits the plane. Not every shot will be cripiling. And I like the ki and still have lots to learn. When I get a chance to fight ink 1v1 and walk away with his nod will I feel I am some what competent. The key to the ki not being the best in one area but good at a few is use ur few good trates to an other's disadvantage. I feel it is right where it needs to be.
"If you dont like the 84 fly it and learn its weaknesses so as to better fight it."
Im currently using the 51 just for that reason.