SN PCA Petropavlovsk, 5.1" Dual SD-2 guns with 2.76 rld on T slots (7 binds of ammo for each guns - max).
Yeah the worst nation to AA with, but who cares, i'm AAer...
Here i did only 12606 creds and got 80k exp (during 50% exp increase event) :
pretty far from my SN personal record 17752, but good exp. Also i'm almost done lvling with AA till SN BB4, just 2 lvls left for BO, supports at lvl, both sets of gunners 91 now :D
KM AA is not the best, actually there aren't best AA nation. It's the skills to aim the shots, not spam them (you KM AA spammer nubs, i wonder why noone uses KM 28 or 29 GA long range AA capable guns...) but i would still pick IJN as the top one :)
you decide how to lvl up...
P.S. forgot to mention, during that 300% increase in vet conversions, burned 3 FULL times my experts (spent all events expert savings) and i'm full with FREE experts again just from AAing (also saving expert items for next events), good luck CVs!