Quote Originally Posted by Lerra View Post
Are new Tyrant Guard considered monstrous creatures or infantry? p.49 says that Monstrous Creatures that are ICs can't be targeted when in a unit of monstrous creatures. I know TG used to be MCs but I'm not sure about the new codex.
No, they are not MC. But the Hive Tyrant is not an IC. So p. 49 is of no concern here.

BuFFo already answered how the HT an the TG are to be used.