At first I had the impression that they would make varghiests or crypt horrors less appealing. But their point value is hefty, so they can't be taken in mass numbers.
They are going to hunt well, and hover gives them an always on 10" move which is interesting. So, they can leave the general without losing much movement. They take damage well, but have little in the way of saves. So, they can't anvil quite as well as crypt horrors. They hit hard and grind well.
I think small units of them will work well as flankers, hunters and in a third new role that is a stalling unit that dishes out damage, doesn't take a lot and suffers little crumble and can hold something in place without much magic support.
They are going to hunt well, and hover gives them an always on 10" move which is interesting. So, they can leave the general without losing much movement. They take damage well, but have little in the way of saves. So, they can't anvil quite as well as crypt horrors. They hit hard and grind well.
I think small units of them will work well as flankers, hunters and in a third new role that is a stalling unit that dishes out damage, doesn't take a lot and suffers little crumble and can hold something in place without much magic support.