I've been trying to do the Fortress of Wind Big Key Skip and can't seem to get the whole thing down, so I was just curious if there was a way of thinking about it that makes it slightly easier?

This trick is pretty hard to get. Watching videos can probably help. Wilzo did a pretty nice vid on it:

If you don't get the trick to use item on minish spot, you basically need to move diagonlly on the spot, use the item, and then just right (the order mght not be right, it's been a while I didn't do it ^^"). Once you have it, pause buffer until you see the bomb blue getting bigger (you'll see the framer better on the video). Then, go up and hopfully you should clip

Got it, I was trying the "up diagonal" version and kept getting the annoying subpixel moment where you do the slow motion animation on the portal, I get more consistency going "down diagonal" instead, thank you.