Actually, only Sigilyphs, but I guess I could squeeze a couple of Outrages in there, picking 2 of the 3 or maybe picking one and running 2 cards of it, depending on the meta you are facing...
My list runs a quite simple and straight foward line: 3 Gengar, 2-2-2 MManectric, 2 Sigilyph and one Keldeo teched for retreats, running with 3 float stones.
Now, I see that 3 float stones might be overkill (or even maybe the Keldeo itself), but it has been working wonders... My opponents need to play Megaphone 3 times to keep me from retreating for free.
Now, I run 2 DCE just in case my stadium goes down and I can't fetch one fast enough or if some gengar gets Head Ringered. That 2 DCE might help to get those Outrages going, if you intent to get them in.
Another wall you could squeeze in is Robo Substitute. With Keldeo and Float Stones, Should your opponent choose not to kill it, you can keep it indefinitely.
This listing is focused and direct: We hit with gengar's first attack for free (with Valley, ofc) and then we proceed to hit with common Manectric + Muscle Band + Head Ringer on my opponent OR Lysandre out someone with a tool attached.
Manectric first attack is also great to deal the first batch of damage. Going second is a must in the deck, since Manectric and Gengar can directly hit the bench while your opponent is still setting up.
Right management of bench damage leads to early KOs with MManectric in the middle game, while walling with Sigilyph. For Donphan, you can charge up Keldeo and add a Muscle Band to it. Next turn, discard the energy and use MManectric to recover them.
My list also run one tool retriever, for those Flare Tools and recovering a Spirit Link, so I can switch it for a Muscle Band. But tool retriever has another uses, like recovering early wasted Float Stones or pulling out the Keldeo trick I just explained.
Gengar's second attack comes in when you want to distribute damage in early-middle game. Usually switching in a Sigilyph will stop most meta decks or, at least, give you a better Prize Trade. Having a MManectric on bench and hitting with gengar, leaving the opponents active poisoned usually prompts them to switch it out or risking a 2 for 1 prize trade.
In the late game, this deck falls short, since it lacks OHKO scenarios. Still, MManectric bulks up lots of HP and hitting with gengar for 70 (or 90) with poison and moving a MManectric to wall in the next hit can help you.
The bottom line is, this require quite the mind game and usually you will only have time to play the first or maybe the second matches in a best-of-three, depending on your luck.
A final and really nice little trick I am pulling with this list is Energy Switch. Since all attackers go for 2 energy tops (counting Valley on, which is why I run 3 + 2 skyla and am trying to squeeze in one more Valley), you can surprise your opponent, as I did sometimes, saving energy from dying pokes and instantly buffing something else ready to attack.
If you wish, you may check my listing here: http://www2.bebessearch.com/Pokedex/DecklistShare.aspx?id=1506739568&key=528688200
It is not perfect by any means, but I like how it plays and I am trying my best to improve it.
