Breaking this down because it bugs me:
You might want to take a look at Ferrus Manus - he gives his entire army FNP 6+ and all AV13+ vehicles IWND, while he passes repair rolls on a 3+
While universal 6+ FNP is nice, damaged vehicles that regen a single hull point? Maybe. Maybe your Spartan will regen a couple of points during the game but you can't rely on it happening since it has to be damaged and only succeeds on a single 5+.
Repairing on a 3+ is cool because you can argue he can do it 2 times (once for each weapon he can shoot) but do you want him sitting at the back repairing? In his transport moving forward maybe but it's not exactly great as a force multiplier if your vehicles are one shotted.
He also has a nuncio-vox but late game deepstriking next to your best meleer? Barraging from a model in a transport or melee? Not great.
Vulkan grants his entire army +1 Ld (just like Horus) and Adamantium Will He is also insanely tanky and can anchor an entire assault line by just being too hard to kill
So Vulkan has one buff Horus has and a psychic defence buff. Woo! Maybe those psychic debuffs and shooting will not be used. Like now.
As for being tanky - we're talking about units that, on average rolls, will spend the entire game in mutual slap fights with each other. It would still take Vulkan 12 combat rounds to kill Horus but Horus would take 6-8 to kill Vulkan.
Lorgar lets all models in his detachment use his Ld, and models that can draw LoS to him get immunity to Fear, +1 to charge distance, and +1 to combat results. Oh, and that whole being a psyker and getting to choose his powers instead of roll for them. You might think Justaerin terminators look cool, but have you seen Word Bearers terminators? No, you haven't, because Lorgar made them Invisible
Since most of the sarg's are Ld9 this gives them +1 Ld (like Horus) and immunity to fear is situational. Both are buffs on the legion buff. So all in all word bearers will probably never have fear or moral issues.
+1 charge and +1 combat results? Useful. Arguably his best buffs considering invisibility is a monsterously broken power which-I-have-no-clue-how-got-past-the-balance-testers. Plus his psychic abilities are due for a faq since 7th dropped so, at best, it's a loophole until then.
How about Alpharius? Preferred Enemy (Everything) for his entire army, and shenanigans for enemy reserves
Shenanigans for enemy reserves is extremely situational. What idenitical units would both you and your opponent put in reserve? Not many.
Seizing on a 4+ (just like horus) and preferred enemy are excellent but +d3" to ouflankers? meh at best due to unreliability for time when you must have already accounted for a bad roll. (1" extra? wooooo)
Dorn allows you to take Terminators as troops without Pride of the Legion, allows his army to use his Ld10, gives the unit he joins Crusader and Furious Charge, allows his army to get +d3 to their combat results in assault, and can designate up to three pieces of terrain or fortifications where the models in them may reroll results of 1 on their cover saves and reroll pinning tests. Not to mention that he allows you to take a void-shielded IWND Thunderhawk as a dedicated transport that doesn't take up a LoW slot.
Dorn. Ick. He is a brutal buffer.
Terminator troops tho? Unless you're going full terminator, hate the other troops, use a non-pride RoW, or really need elite slots it's meaningless. They already score.
Ld10? Again this is effectively +1 Ld for most units (so it's just the same as Horus)
The rest are very painful. The, relatively, dirt cheap thunderhawk is one but you're probably in Apocalypse Land there and LoW doesn't matter. The ~200 point price drop does. I mean damn. It'll certainly will stop anyone at the palace gates. Except Dorn won't stop a primarch in hand to hand (Horus comes to mind). Given the other combat differences unwieldy makes Dorn a spanked baby. (no I do not like the Imperial Fist fluff)
On to Horus!
Horus gives +1 Ld, makes two overpriced units into troops choices, seizes on a 4+ (Alpharius get this, too), grants units in reserve Outflank (forgot to mention, but Alpharius gives outflanking units +d3 movement), and he and an attached Terminator unit can Deep Strike without scatter. And a Cognis Signum for boosting the BS of a squad within six inches, but that's the exact same thing that a Master of Signal would have (and which you might be taking anyway as a cheap HQ that stands around in back while the Primarch is up front).
+1Ld is ok. Quite a few primarchs have it. It isn't great but is useful for the basic boys.
Seizing always gives a warm glowy feeling.
Giving outflank is insane since EVERY unit can now do it (and appear early due to legion rules). Especially fast movers like bikes (I know you don't like them kit) or heavy alpha strikers like plasma in rhinos or sniper vets (hang on they're troops now!) or even giving a degree of extra invulnerability to a rock land raider (maybe with horus in it?) It's an optional extra that gives you more flexibility to all your units.
Veteran as troops is useful. I wouldn't say they're overcosted but so may people overspend on them rather than making them what they are - tacticals with ccw, weapon access and a special rule. They're akin to reavers in that regard (irony abounds)
Justaerin are still 50 odd pts too much and need access to plasma blasters.
His precision bombardment is ok as I can't believe Horus doesn't get relentless from his unique terminator armour.
The cognis doesn't need to be in the unit it's buffing. You could -citing example from early post- use it to buff nearby terminators so they can plasma a bubblewrap before charging and pulling remnants away so horus can sneak through the hole and go dave grohl on the rear of that tank with worldbreaker. (I still can't believe he doesn't get relentless from his unique terminator armour.)
I would question if his Sire of the SoH or teleportation rule affects fliers he's in. I don't think it would but an unscattering turn 2 appearance of a thunderhawk in apocalypse (and the following assault) would be funny.
I don't agree that Horus is the best force multiplier. Or even the worst. Horus is never meant to be the best at anything, but he was supposed to be the best of everything.
He's a solid all round fighter. Able to stand up well against most other primarchs. Able to deal with terminators and power armour dudes in droves. (I wouldn't be surprised if he killed 10 on a turn he charged) MC's are an issue but they are for all the primarchs.
He has good buffs. Certainly not Dorn level but the Sons and Horus have changes to go through between now and the Emperor's Palace. Hopefully it's redress some of the creep going on.
Damn that's a chunk of text. I feel better.
Edited by Sanct, 10 July 2014 - 11:24 AM.