Board Thread:Questions and Answers/@comment-26544002-20151221115738/@comment-3104099-20160626171921

Kogetsu has been shown to be a superior weapon against Neighbours. Scorpion was a weapon made to counter the former, hence it performs well in rank wars where majority of the agents have Kogetsu, but Scorpion was shown to be not so good against Neighbours. As demonstrated by Kazama unit against the Rabbit, when Utagawa and Kazama failed to even scratch its head when they attacked it together and Kitora, when her scorpion broke into two little pieces from one punch from Rabbit. While on the other hand Kei was slashing down Rabbits like they were made out of soft dough. Not to mention with Senku its versalitiy increases massively as exhibited by Shinoda in an extremely flashy way against Enedora and his dummies.

If I was an agent, I'd personally have Kogetsu and Senku (must) equipped. As the main offensive weapon and a shooter trigger (Viper) as a back-up weapon.