This is all moot: Creed would tactical genius the Emperor into the middle of the fight in the form of the star child.
Just tested it, did best of 5 since they are both extremely deadly. Swarmlord won 3-2, the guy is a complete monster in close combat.
Oh, alright! I was pretty certain there actually was such a thing as undivided Daemon Princes. May just have been a mistake on my part though... Either way, sounds very interesting! Would be cool if they covered it in more detail.
There is such things, which is a point I've always wondered. I would put it down to the fact that he is only an ally with the warp and doesn't give himself to it. He may want to stand over the corpse of the Emperor as an Astartes, a somewhat funny irony that it was the Emperor that created the Space Marines.
High hopes for Talon of Horus, can't come soon enough. That being said, I'm finding it hard to believe that you can DENY Daemonhood. Much like you can't deny Spawndom. " Please Khorne, just five more minutes "
Despite Gazghkull's strength, in a 4 way, I never trust an ork not to run straight out in the middle screaming and get sandwiched by everyone else. So I would also have to go with Abaddon.