Unchained Evil Twins

This deck has two parts: the Evil / Live Twins, and the Unchained. A good connecting point is Evil★Twin Lil-la: you can use her effect to activate a card like Abominable Chamber of the Unchained. In an ideal world, you can end turn 1 with both Evil★Twin's Trouble Sunny and D/D/D Wave High King Caesar on the board, use their effects to stop any momentum your opponent might gain on their turn, and then start hammering.

As a general rule of thumb - if you want to play Live Twins (Not the Evil Twins) in a given turn, it's best to do them early. They're likely the only Non-Fiends you'll be summoning, and virtually all Unchained monsters will prevent you from summoning them if you use their effects first.

Evil★Twin Challenge and Abominable Unchained Soul are cards that aren't necessary to the strategy, and the bonuses that they provide are largely circumstantial. I personally love them, but if there's other cards you want to run instead, i'd get rid of these first. I'm not running it, but lot of people really like Live☆Twin Ki-sikil Frost as a way to help your Live Twin combo if it gets interrupted (Live☆Twin Lil-la Treat also works, but has a much less powerful effect).