So I've looked around the forums and I think I have the answer for this but....
A few days ago my friend and I talked about my fledgling
IG army and how many flamers I had. He joked that I should bring an immolator next time and as a reply I looked at a
WH codex. I pointed out that as allies I couldn't have
HS units and he looked it over and said "But the Celestians are an elite choice and can get an immolator as a transport"
We looked at the new
IG faq and it read that when
IG are allies troops can pick up dedicated chimeras as part of the troop slot.

So, uh, yeah because it's an elite unit option would an immolator count as the elite dedicated transport or does it break the no
HS rule?
Thanks for any insight on this