You are completely right. Even more, I just notice that ROA gives you the same AP, and with it's passive gives you even more. Thanks for the comment, I'm changing that.

Why rylai's if all ur spells already slow, or trap, please give me reason. I wont -1 because i aint gey, just because i dont like build so no worries.

You won't need the shield if you go mid. You are alone, and away of your enemy's attacks. That's why I let that ability for the end. If you are in a Lane you could think putting some points to it so you can help your mate, but at mid it's not necessary.

And the fact that you are away is the reason why you don't need more HP. Rylai's is a good choice cause of it's passive. Getting Lich gives you AP, Movement, and more, better than the Rod that will give you more HP and it's not needed if you are playing as you should.

Thanks for the comment.

I dont like the fact you max Barrier last. This skill is actually really good. That barrier is prevent about 300 damage front and back if your good at knowing how far to throw it. Light Binding is great but that would be that last skill to max because your teammates should be doing damage to them within the 2s root.

Lich Bane is a bad choice. Her spell are not 3s spammable. Even at max Cd There 7s.
Rod of Ages > Rylin Staff: more HP and AP.

Pa muy buenos aportes.. Me sirvio mucho.