Question on I Am Alpharius Warlord Trait

[Kaldoth]

So, a question on the I am Alpharius warlord trait...  It says in the codex that you randomly generate a new warlord trait for him.  How does that work in conjunction with the new vigilus ablaze warlord traits if I want to run a specialist detachment?  I was thinking of taking a termite drill with ten possessed, a greater possessed, and then a master of possession and running it as a daemonkin ritualists detachment. If I made the MoP my warlord, would I be able to take I Am Alpharius and the Shepard of the True Faith trait as his secondary? Or are you unable to take any of the new ones in conjunction with I am Alpharius as it says you have to randomly generate the second trait?