I've tested this list at my place with a another friend of mine multiple times over so far. This list seems to be pretty efficient. I've played against Ultramarines, Necrons, Chaos Space Marines, and Deathguard. Its record as it stands are as follows...... wins 5, loses 1, ties 1. Give a look and see what you think.
War Cabal: Magnus the red.
Ahriman on a disc.
2 decked out Exalted Sorcerer's, with gift, spell familiar, one with Magnus' scrolls, and the other with Helm of the third eye.
10 Rubric Marines with their Aspiring sorcerer with a gift, with one soulreaper cannon, and an icon of flame.
2 units of 4 Scarab Occult Terminators, with 1 soulreaper cannon and a hellfyre missle rack each. (Both units are exactly the same.) Both Scarab Occult sorcerers in the units have Inferno combi-bolters and a gift.
1 Hellbrute with 1 twin-linked lascannon, and a powerfist with a combi-bolter.
Well the only thing to break Magnus so far was an Ultramarine Lascannon overload. and their Pysker phase is broken. So many dice its real hard to keep up with. Plus if i take mostly Tzeentch Powers. I max out on dice every turn with an additional 12-16 dice from Psykers depending on which formations i take. Oh, plus with all the blessings i can cast. i can boost all of my units invul saves to 3+.
Just out of curiosity, how do you think it'd do against massed poisoned weapons? I mean, 3+ invul doesn't mean a ton to me: 5+ AP on most of my stuff means your power armor is just as good. Is Magnus Monstrous or Gigantic?
I kind of agree with sizzly, there dosnt seem to be enough bodies here. I think for more casual style play , the list would be fluffy and fun to play against, but against something like a tough shooty eldar or tau list, im not sure this list could stand up to that firepower for longer than a couple turns.
In which you are correct. But that's why I would have to possibly Sacrifice Magnus for more armor choices. Which is what I needed to do last weekend against Lion. he used that daemon price formation with the four daemon princes one from each sign. Wow so brutal, that hurt... lol.