Blackwings aren't doing very well competitively right now. Hopefully, this changes with The Shining Darkness, as it releases Breeze the Gentle Wind and Blackwing Treasure, two cards which will give Blackwings a big boost. I'm going to list some fun tech cards for BW that I've thought up of, but they may not be very good. I think that it might be worth doing a lot of random things to see what works best. A basic tenet though, for BW, is you have to run 3x Shura, Bora, Kalut, and 1x Gale as basically the necessities. On Pojo, I saw someone using 1x Bora (for less clogged hands) this is a really bad idea since Bora gives high BWW searches. He also did 2x Shura, and 2x Kalut in other builds. I have no idea why he would want to do that. I'm pretty sure that altering the number of BW's played isn't the best course of action. I really shouldn't be bashing on him though since a lot of my teches are kinda weird too.
My first idea is Blackwings + Tragoedia. This idea was inspired by Jae Kim. The logic is that by having BWW, all your Blackwings float, keeping Trag's attack high. You can also tutor for the level you want to steal, as there are a lot of commonly played 2/3/4's. I added Reckless Greed, allowing you to draw more. It's also a Sakuretsu when used with Tragoedia. Last of all, it can help you hit Black Whirlwind, and etc. The skipping 2 draw phases might be a turn-off, so I guess you could try Jar of Greed.I tested this deck and it did moderately well against the other top decks. It really gave Blackwings a speed boost. However, other players (particularly CuDi`) would prefer Jar of Greed in the spot.
Tragoedia also helps stop the OTK's that are running around this format, so good card.
The next idea isn't really that great but it's worth mentioning. It's Mask of Darkness. Mask lets you recycle your Icarus Attacks, Royal Oppressions, and the staple Traps. It sounds decent in theory, but it might flop. I learned about this idea from 25Strat. Not to sure about this idea, but it's worth a mention. It would be better if Crush was still around.
However, Blackwings run a lot of Trap cards, so it might be a pretty decent idea to main.
Mask of Darkness isn't that bad of a card though, and it's a 1-1. The list that 25Strat used contained only a single teched copy of Mask of Darkness. If I were to try the deck out, I would use 2 copies for more consistency (and also so I could see what actually happens due to the inclusion.
Light-Imprisoning Mirror is actually pretty good in BW. By maining it, you can defeat Lightsworn and anti-meta decks more easily. It also is effective against Chaos builds, especially those that use Ryko (which is the majority of the competitive ones.)
I would think about maining 2 Light-Imprisoning Mirror in Blackwings. It helps defeat LS, pretty much the dominant deck of the format, and it also beats a lot of other ones. Too bad it makes you weaker against Zombies (since it is a totally dead card then.)
The last tech I have is Banisher of the Radiance. This card pretty much destroys the meta. Unfortunately, he has a relatively low attack score - 1600. His associate, Banisher of the Light, has 100 attack and 2000 defense. That's too slow, since by the time you set it, LS can already wreck you, and so can ZOMBIES. wlsack has suggested playing triple Banisher with triple Waboku. This might become good. In theory, it should smash the top decks, but it might not work as well in practice.