I swear I'm not just prepping myself.

I have found that playing Sejuani support with Kalista is very easy but no I am not just playing Sej in preparation for Poro Sejuani. Sejuanis E passive/active is just like Kalistas where you hit them with auto/spell and you apply frost and as soon as you activate you deal the damage and slow. Sejs Q is great just for knock ups and hits on enemies and her W is great for when you engage to deal some AOE damage. But her ult is a big stun which is great cause it can hit multiple enemy champions. No this may not work in higher elo ( I am Bronze 2) But I find it really easy to support a Kalista with her. Just my thoughts!