What I like to do for my small form keyboards is assign PgUP PgDN Home and End onto the arrow keys under a separate layer. You could do that here and free up two of those keys for modifiers. And leave insert where it is. Or you could do ins, home, and end on those 3 keys and move pgup and pgdn to the arrow keys. The beauty of designing your own is that you have the freedom to make these choices and pick what’s best for you!