Just have to be aware of distance gaps as 4h/5h may actually gap different if you want to replace 4i/5i.Every single time I think about top of the bag I wonder if it's weird to want 2-3 hybrids and start at a mid iron? (whether or not that's actually possible - doing the individual irons).
If I hit hybrids better than long irons, that's the thing to go with. I've never thought about any big loss of not having a 4i or 5i in my set up but having a 4h/5h.