Lets be clear: this deck is not "good." You can tell that because Dragoon is crammed in there at the end just to make it all work. It is, however, surprisingly usable. There's a modicum of synergy between the three archetypes in play here--the Dangers can drop both Quants and Shaddolls from your hands to trigger their effects, and the Quants provide the attributes necessary to take full advantage of the various Shaddoll fusion monsters.
However: because of how the Dangers (and, to a less effect, Super Quantal Fairy Alphan) work, this deck runs on a bit of randomness. You can't always control
exactly what's going to happen, and the inherent chance for everything to go wrong and stop working on a dime is what drives this deck into the strictly "casual" territory. This deck is a toolbox, not a combo machine; you make what you can out of what you have, and sometimes what you can manage to bard out
will surprise you.
This doesn't stop the deck from being able to put pretty convincing boards up when everything
does go right, though: El Shaddoll Winda is a forever-great floodgate and is impossibly easy to summon with Verte Anaconda. Backing Winda up with quick-effect interruption from the Quant Xyz monsters, Dragoon, Dingirsu, or Number 38 can be pretty paralyzing--Winda plus even just one of these is a comfortable place to be in, in more casual/non-meta settings. And in the (VERY LOW) chance you manage to put Super Quantal Mech King Great Magnus on the board next to something like Winda, you're gonna feel real smug.
The main appeal of this deck is, honestly, the novelty. This is probably the weirdest way to play both Quants and Shaddolls, and probably the worst way to do it that actually works. It's also still a work in progress--ratios still feel weird, especially with the Quants. Anyone who wants to take a swing at ironing out the creases in this honestly ridiculous Frankenstein, be my guest.
Full credit to HardLegGaming's
Danger Dolls deck profile for the inspiration, and basically half the decklist. It's also a way better deck than whatever I spat out here. Check it out.