I can't -- and no one else can -- give you any real advice without some sort of strategy in mind. I assume, however, you mean to set up with Beautifly/Ho-Oh and use Hydra to move the energy to Giratina and start wailing away with his second attack? If this is the case, then I would definitely
not run Beautifly. It is just too inconsistent for what the deck's main strategy is. I haven't really thought about Ho-Oh, but without Energy Switch, you cannot get off the Psychic Energy from him after you Rebirth. If you want to run them, I would actually consider running them in their own deck. Simply pile on energy with Beautifly and whomp people's faces in with Ho-Oh. But not in this deck.
So, here's what I would do to make this deck a true Giratina EX deck:
- Dragon Deino (You'll find out why later)
- Beautifly line (4)
- 1 Ho-Oh
- 4 Grass (not needed because of Blends)
- 4 Psychic (same as above)
- 3 Float Stone (You'll find out later, as well)
- 1 Scramble Switch (with Hydra and the lack of other colored energy, this card is useless in this deck)
Free cards: 17
Surprisingly enough, though, you could keep Genesect if you face a lot of Keldeo and you wanted a nice little tech to blow their faces away.
After all of that is said and done, I would do this. Now, bear in mind that this might not work, and this is just an idea that I had, so no guarantees whatsoever that this will be at all playable or consistent, but:
+2 Darkrai EX (For a second attacker and for his Free Retreat Ability. This guy makes Float Stone useless in this deck; he's that good! Plus, these guys are pretty easy to come by, especially since they came out in tins a while back)
+2/2 Altaria line: (Little rogue idea I had. I mean, with two of these out, you can OHKO Deoxys EX and Thundurus EX. You fall a bit short on 180 HPers, but still, that is pretty sweet.)
+3 Dark Energy (Because eight energy in the deck is
way too low after you take out the other energy.
)
+ Dark Deino (Because of the next entry)
+4 Dark Patch (They speed up Dark Energy to Darkrai and the Dark Deino, so you can get set up and start whacking away faster)
+1 Computer Search (Computer Search is just an overall good card. Not only do you discard Dark Energy so you can Dark Patch them, you can search for
anything in your deck.
Anything. It's that good.)
+3 Sableye (Sableye Junk Hunt is one of those things that makes it a good day to be a Dark Player. Not only do you get to snag those Candies, Catchers, Lasers and whatnot out of the Discard, he's a Dark so you can Dark Patch to him! He has been, and probably will be until all of the Dark Stuff goes out of rotation, one of the most defining cards of the format. Plus, he's cheap as dirt.)
Cards: 17
Total: 60
Hope this helps!