Nasus' Q needs a nerf.

I literally cannot stand playing against Nasus because no matter how much I try to harass him in lane, he still always manages to get his Q stack beyond stupidly high. When you, as a champion, are able to 1-shot other champions with a single ability and you've only built one damage item, then it's really time to nerf the scaling on that ability's damage meter. I'm getting sick of losing games simply because there's a Nasus on the enemy team.

A few ideas I have on nerfing his OP-ness:

1. Scale the damage down - I've literally been hit for 2k by a Nasus that I kept harassing in top, and yet his Q still got a ton of stacks.
2. Make it so his stack ratio is 1:1 for each minion kill and 2:1 on large minion kills - Nasus is a TANK. He shouldn't be doing SO MUCH DAMAGE IN ONE HIT.
3. Take his ability to use his Q on structures away - Literally 2-3 hits structures. There is no other champion in the game with that capability. It's so broken. All he has to do is kill me once, and BAM turret's gone.
4. FOR GODS' SAKES, STOP LETTING IT HEAL HIM!

Any combination of these nerfs would work, but his Q needs to be rolled back. It's way too powerful and easily exploited in low-skill level games.