This is a mostly exact copy of Luke Boncic's version of Darkstrike, which I wanted to showcase here for archive purposes. As you can see, the gameplan is pretty simple: lots of stat-heavy monsters, dump them away with removal then rush in with Strike Ninja for big aggressive plays.
Despite me being worried that this would brick given the amount of "can't be Normal Summoned" cards here it suprisingly has been pretty robust in playtesting, only having the occasional slightly bad draw. Trunade and other powerful backrow options keep the backrow in check to protect yourself while aiding that eventual OTK strat down the line. The deck isn't really built to grind, it's built to just last long enough to make a competent charge.
Side-deck is mostly counters to warriors alongside Cold Wave and Fragrance to stop spell-heavy/similarly aggressive decks. Return is useful as a less impressive Fusion but can definitely aid in a clinch, especially given it unlike Fusion banishes everything back again so you don't have to worry about rebuilding your field.
The Magician cards are there to run though the deck alongside a potential 500+ boost to all DARK monsters, which in the long run can actually be a substantual play given the strength of your big Ninja plays.