An Army of Formations - but not a Decurion!

As a follow up to yesterday's post, here's a thought I had:

Could an army made of just Formations work? Including neither a CAD nor a Reclamation Legion required to make it a Decurion. As follows:

• The Reclamation Legion, as I said before, is kinda lame because of the restrictive nature and the fact that it requires a lot of Troops but robs them of ObSec.
• The CAD is nice, but is basic and doesn't bring the powerful addons of the Formations.

Our formations are fantastic, let's get that out of the way. Canoptek Harvest giving Scarabs/Wraiths/Spyders RP? Heck yes. Destroyer Cult making the already fantastic Destroyers more powerful? Superb. Deathbringer Flight making our pretty good flyers extra scary when they work in tandem? I mean, I'll take it, even if I wasn't particularly looking for it. 

Both the CAD and the Decurion add an overhead to these. Not necessarily a bad  overhead, don't get me wrong. ObSec is game changing. 4+ RP is golden. And the units, while not particularly overpowered, are useful in their own right. 

However, what if we considered using simply all Formations as a way of building the army? It would be a relatively simple venture, and there's a decent variety to choose from, especially if you add in Exterminatus for Conclave of the Burning One. (Though we're going to ignore the other 3 as they're basically full armies in and of themselves)

You're also not out of luck for Warlords - a Royal Court is easy to include, and the Destroyer Lord from the Cult gets a reroll on the Necron table. The Conclave also has 3 Characters, though they don't get a reroll of the Trait. 

The only real issue one might have is with number of bodies. Our Troops (and Flayed Ones, to an extent) are our way of putting lots of models on the board. If you're looking to do that, well then you're not going to be pleased. The cheapest models in the non-Reclamation Legion formations are Scarabs in the Canoptek Swarm and Praetorians in the Judicator Battalion. So, this would be more of a "small/elite" type army, but depending on how you build it, you can create a fairly solid MSU list out of it.

As a test run:

Destroyer Cult
Destroyer Lord (Voidreaper and Phase Shifter) - 155 Heavy Destroyers x3 - 150
Destroyers x3 (1 Heavy) - 130
Destroyers x3 (1 Heavy) - 130
Destroyers x3 (1 Heavy)  - 130

Conclave of the Burning One
Nightbringer - 240
Cryptek (Veil of Darkness, God Shackle, Phase Shifter) - 125
Cryptek (Solar Staff, Phase Shifter) - 105

Canoptek Harvest
Scarabs x3 - 60
Wraiths x6 (5x Whip Coils) - 255
Spyder - 50

Deathbringer Flight
Doom Scythe - 160
Doom Scythe - 160

1850

Had to drop one of the Whip Coils to make room for a Phase Shifter. Let that one Wraith be the one that tanks things.

We have 6 fast moving units, a cheap MC that buffs two of them, a powerful deathstar that can teleport, and two flyers that are effective against pretty much anything. That's not bad, not by a long shot. It's a bit light on bodies, but we can create more Scarabs and the units we have are fairly durable, the Scarabs and Crypteks being the only things below Toughness 5.

It also lacks ObSec, which could be a death sentence against things like Drop Pod spam and Scouts. It's fairly durable against things like Hive Tyrant spam, but it might have trouble knocking them out of the sky. But I think overall, it's a fairly solid list that can weather most opponents and crush many things in either assault or shooting.

How about it? 7th edition let us play building blocks with our detachments, and this is a new way to put an army together that I think could give a lot of very solid lists a run for their money.