Nasus Balance

We all know Nasus,And how Strong can he be.He is a crazy champion,His Q can deal huge damage late game(When farm it 300 or more). I want to share some ideas about Nasus to make him more balanced champion (60% of them on his Q):- 1- His Q has low Mana cost,It cost 20 Mana at all ranks,That's sick,Middle game (10 min of the game)Nasus start to get 20 mana before its cooldown finish,What do i want to say is that you need to increase his Mana cost on Q like 20/25/30/35/40 or something like that.

2- Again,Nasus Q is really strong when he hits a turret,i saw Nasuses only reached 300 stack on Q and deal more than 600 damage to turrets,I mean Nasus can destroy turrets really fast,Faster than any other champions.What i want to say is that you need to make it deal half the damage for turrets,I think that way will be better.

3- Nasus's Passive,I think that Nasus passive need to be changed,Because sometimes when you attack Nasus It is useless,because whenever you deal damage he will heal them in 2 Q's or 3 basic attacks,But if you wont change his passive i think you need to make it increase with each level Like this:- 3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20

Its just an ideas&suggestions to make Nasus more balanced champion. These are my opinion about Nasus,So Whenever you agree or not its your choose.