The unfortunate truth about this and most Reaper King decks is that they suffer pretty badly when the commander isnt on the field
Also incarnation means something that becomes flesh although it wasn't before, so if she's an incarnation, she's no longer a spirit, and if she's a spirit, she isn't an incarnation
Dealing combat damage with Elsha gives you that many 1/1 Monk tokens with prowess, so spells that let you slip past blockers and gives Elesha a power boost helps to make them an all-in strategy
Secondly, since Spider-Man is Standard-legal, it can't have many cards strong enough to prop up Pioneer or make it in Modern
[Update]: Kamigawa: Neon Dynasty has now arrived alongside a host of cyber-ninjas, biker rats and mechanized goblin samurai
One example of a historically successful deck in the land format is