That maybe be what the statistics say, but in actual game play some time that extra ap that i all ways there is more useful, hell a combat knife overall is better then what he listed as the virbosword stats, plus it is not restricted (or straight up forbidden). So with those thoughts either mono with custom grip (plus easier to hide when off), katana (acc 7 reach 1 dv 3+st ap -3), or if hiding the weapon doesn't matter highland claymore (acc 5, reach 2, dv 5+str, ap -5).
But those are my opinions and experience in the game.