Vincent, Vengeful Atoner* Give Vincent, Vengeful Avenger a powerful piece of equipment (like Excalibur?) and make sure he gets through and he will swiftly take down an entire table of foes
Notably, Priest of Forgotten Gods is a card that you can activate repeatedly to take over a game, giving the deck a powerful engine to build around that doesnt require any focus on the combat phase
Thus, Reaper King has a mana value of 10, even if you spend to cast it
Furthermore, Team Rocket's Spidops can deal 180 damage with an attack, or 220 damage when using cards like Black Belt's Training, which makes it an incredibly useful single-prize attacker
The Knight is likely better, as First Strike tends to be superior to Vigilance in aggressive decks, and it puts the (not necessarily Basic) Plains onto the battlefield un tapped
Thats why she is the top-ranked planeswalker for multiplayerno one else charts more highly