Nasus seriously needs some help
His winrate has dropped even further in 7.13 to 45%. The tank rework did him no favors. You changed/nerfed aspects of tank itemization that Nasus depended on most (HP, high resistance values) in exchange for more utility/variety. No build feels good on Nasus either. Full tank Nasus used to feel okay, that feels like dog shit now. Trinity/bruiser Nasus used to be great when ahead/farmed, now you just die upon being winked at. And if neither of these are good, off-tank/bruiser Nasus doesn't feel good either.
Anecdotal: I've played 2k Nasus games since season 2 as a Nasus main and through s3-s6, I have easily maintained a 58-65% winrate with him in high plat-mid diamond. I can't even manage a 50% winrate on him now in mid/high plat. He just feels like complete garbage. Getting farmed doesn't matter. Games pace too quickly and his huge mid game spike is non existent.
He never feels durable enough. He needs %hp healing as opposed to flat lifesteal and his ult needs to grant him %damage reduction, not flat resists. By the time he makes use of the stacking resists, his ult expires. I liked the idea of the change and initially it was a nice buff but the game changes and some things fall by the waste side. This was always a counterintuitive concept with his ult gaining resist values as it lasts because you end up being tankiest when it's needed the least. If you survive, your team was going to win that fight anyway. If you died, clearly it didn't help.
Can a rioter please comment on the power level of Nasus? It's garbage