Hey guys, i discover this neat little exploit that let you farm a4 key warden without any risk at all at any mp level.
Basically the gist of it is lure the key warden to this particular spot on the map. Then he cannot attack what so ever.
https://i.imgur.com/keNQb.jpg
Since key warden is such a fat ass, he cannot pass through that little gap.
more importantly he have no range attacks. Therefore you can just pick him off from distance.
not all map have this feature, but most of the map have that little gap present.
There are similar gap in a1-3 key warden area. but most of them have range attack, so it is kind of pointless.