Sejuani is mainly a tank and my favorite tank at that. she deals great burst damage early games and if positioned right can effectively help your team steam roll. however i have had early game issues ks'ing my carries and tanks don't need 10 kills 2 or 3 are fine but her kit makes it easy and if you click first ask questions later then ks is what you'll do. so i recently desided to try ap and health for a carry build. the weakest part is early clear you get low on blue and gronk at end of first clear after that clears get much easier and by 20 min. you clear like the best. this is a pricey build so don't expect to carry every game you are late game insurance plan no 20 min gg. that said if your in the team fight and know what to do your team will be unstoppable. I am silver 5 so not that good but I'm climbing. i main favor cc champs look me up NA server GoldenDraak I play Sej every chance I get, my last 2 games got me s-rank and I get s and a rank with Leona. Silver 2 my first season stayed stable then slumped to bronze 2 after that with the help of a friend I got back to silver 5 for end of season. This season gold is my goal.

start bot lane camp then buff camp and then scuttler, next look at mid and bot to see if gank is possible if not finish bot side jungle then get top scuttler if possible then top buff and gank or one more camp then back. scuttler is yours don't share him. i find pre 6 mid is the easiest gank next to an unwarded bot lane opponent. look to clear jungle camps and only gank if the other team is extended. after rod of ages your clear is fast just make sure to get the most out of sheen proc.

you are your teams engage not tank start fights with q or r get a few hits in then circle away from damage a circle pattern around your team during fights can help you stay safe and if a team mate gets focused you'll be close enouff to help. late game fights kill anyone who tries to fight you save ult for if your burst only does half health to keep them stunned for a second w e. your combos are w,hit,e,hit,q,hit repeat. q,hit,w,r,hit,e,w. you do a lot of burst damage and in group fights try to aoe as many foes as possible before hitting e. your late game clumped enemy penta is r,flash,w,q,e hits as possible and only massive tanks will survive then die best from a bush, baron pit, or tower dive.

pros
burst damage
underrated
fear "massive cc high health huge hits"

cons
low armor
low MR
easy to get carried away
don't tower dive without healthy backup