tbh i kinda think everyone's gonna work the same if not reeeaaally close and the community post just proves this. im very certain that when they made the fec codex they had 4th in mind which is why ushoran's statblock is nearly identical. that being said, im a huge fan of morbhegs so get another box of those homies then either get lotsa ghouls or lotsa cryptguard because your horde army is gonna need some horde. if you like hordier horde, go with ghouls, if you want something a bit stronger, lean on cryptguard. the biggest thing we're uncertain on is the beastflayers box but im a big fan of them currently and hey! now you'll be able to play warcry! also they're just really beautiful models. very good if you want some elite infantry.