Hello! Very well-made guide, my friend!

I am very glad to see, that you, just like me, hate playing against Morgana.

In my opinion, if you are playing in low ELO, your last item (or any item after you've bought all the utility you need and don't need resistances) should be something with AP. I think probably the best item for that is Horizon Focus, as it gives you a lot of increased damage even if you don't have a lot of AP and it is easy to activate.

Let me know what you think! Best of luck!