Hehe, almost, they all cause Fear and are Immune to Psychology. So forget any tactics which rely on Panic or Terror…
Haven’t played them myself, but the majority of battle reports on YouTube feature Tomb Kings. I’m sure you’ll find lots of inspiration there.
Generally it’s still true what always had been true: most of their units aren’t particularly strong, the problem is they don’t stay dead! Bring anti-magic and kill their Hierophant as quickly as possible.
Whatever you come up with, feel free to add to the big tactics Wiki, as this is exactly the kind of thing I would like to collect for every army.