Well, he has immunity, his skill (sealing) hits hard and he boosts himself. He is not that bad.

I think light main is not bad, the bad is the ninjas available on zenith. light main essencially needs other swordman ninjas to work well and zenith arena rarely delivers swordmen. Maybe they should add some more swordsmen ...

lightning main is bad in zenith because many of the ninjas he requires to work well are expensive and because he doesn't give much support.

He's not as bad you may think. You need to play him like 1.0 and 2.0 play style.

Weakest in zenith is most likely fire main lmao

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.