Every main has weakness and good things about it in zenith , you just need to use them good.Lightning main is well rounded coz you can,use him in different ways,,, you can blitz it out, you can, use it just support , you can ,use him as pos 1 ... and sword ninjas or even blitz type ninjas are not that difficult to get in zenith . I bet if you played you will get every time a couple of them in each match.