League of Legends (LoL) Question: How can we Buff Garens W?

So, everyone knows and loves (Ok, maybe not everyone) Garen. He was probably one of the first champs that 80% of use tried to use when we first started. He is a solid pick right now with the tank meta and has a really good early and mid game. But Garen's problem, of course, is being CC'd and kited to death in the late game. So here is were I was thinking about so ideas to change his W Courage.

As of right now, Courage Passively gives you 20% of your current Armor and MR and a 30% reduction to CC and damage for 2/3/4/5/6 seconds. The problem, Imo, is that it doesn't give you anything when you level it up but CD and extended time. So here is were I started thinking about so things.

But before I say what they are, I want to take a look at what Garen is supposed to do in a team fight. He is supposed to break slows with his Q and use his W Courage to reduce CC and Damage to get to the back lines. In all reality, this never happens because of being Chain CC'd to death.

My first Idea for his W was to give him with, every level, more reduction to incoming CC. This would help him stop being CC'd to death before he gets to the back lines. I was thinking about having it scale like this. 20%/40%/60%/80%/100% (Immune to all disables). This would help him a lot in being able to get to the back lines. and before someone says, "Oh, Isn't that just a Olaf ult?!?" Yes and no. Yes, as in it is the same thing has his ult with no disables. an no it isn't. Olaf gets his ult at level 6. Garen wouldn't get this until level 18, because the maxing of his Q and E are so much more important to his early game damage. This is why I think it is an ok buff to him because of him not getting it until level 18.

The second part I was thinking is making the damage reduction more as it levels. I was thinking around 30%/35%/40%/45%/50%. This would allow him to soak up more damage when he's in the back lines. And before anyone says, "Isn't that a weaker Alistar Ult?!?" Again, Yes and no. Yes, he would get less damage reduction and more as he levels, But, No, like I said with the Olaf ult part. He wouldn't get this major spike until level 18. And if you really think it's not balanced, he is my solution:

Make his W Courage be a two part skill. We could extend the time of the skill be about 2 seconds at max level but, of course, make the CD of it longer to be 40/37/34/30/27. This would hurt his early game a little but help his late game of course. So it would be 4/5/6/7/8 seconds. He would get his CC reduction for the first half of the skill and for the second part he would get the damage reduction. This would allow him at level 18 to Use his W, get 4 seconds of immunity to disables (He doesn't get his damage reduction though), so he can get to the back lines and after that 4 seconds, he would get his damage reduction, but lose his CC immunity. By this time he is already in the back lines. He would be able to cause chaos back there and help win team fights.

And keep the passive of the 20% Armor and MR, It's fine where it is.

I believe this would help his late game a lot. He could actually be able to get to the back lines with the first 4 seconds with the CC immunity. This also mean that the enemy has burned all their CC on Garen and not your ADC. He would still take a lot of damage for the first 4 seconds but the next 4 would make up for the damage he took during his first stage. He would be in the back lines Spining2Win and taking 50% less damage. And if anyone says that it would be OP or broken, here's the thing. If the enemy team are smart and don't burn all their CC on Garen in the first 4 seconds, the can still cc him in the last 4 seconds because he loses his CC immunity but gains Damage reductions. This would make him like the Garen he is right now but he would still be a threat because of his constant damage from his E and the damage reduction so you can't kill him.

Garen is one of my favorite Champs and I would love to see him have a little more power in the late game. So tell me what you think of these buffs and if there could even be a chance to get Rito to do them.