I have some domains on same ip , I never mind about that because they got different niches but now I got some niches and my sites going bigger.

I setup one seo vps hosting for my domains. I got nearly 50ips but 10 of are c-lass and some are b-class.

I wonder if I would have more benefit if I setup my domains to b-class or what if I setup different nameservers for my domains are there extra advantage on it?

Please tell me your suggestions cheers.