If I take Kaldor Draigo as my lord of war choice along with a Librarian as my HQ choice, am I allowed to say that my Librarian is my warlord and roll for a trait with him instead of going with Kaldor Draigo's codex given warlord trait? Or is this not possible at all?
I ask only because I feel as though Draigos warlord trait is weak when not fighting daemons and would prefer a chance to roll for something better.