This card gets interesting when there are multiple opponents, since they will be able to avoid Mangara, the Diplomats first draw ability by attacking another opponent instead of you
The pool of one-use assassins is much larger, perhaps because the Royal Assassin model proved too oppressive for the creature-friendly modern era
Its Number C form, Dark Storm, can do the same if Dark Mist is attached to it as an Xyz Material, except its effect reduces the opposing battling monster's ATK to 0, whilst increasing Dark Storm's ATK by the original ATK of the opponent's monster
But one planeswalker card stands out in particular, and that's evil Nissa
That's the true power of double strike.
I still think something using Embercleave, Heros Blade, Ronin Warclub, Sai of the Shinobi, and Stormrider Rig are viable, it just might not be as thematically focused as my first idea