Mono-green Landfall ramps into big threats like Mossborn Hydra, which doubles its +1/+1 counters off land drops, and Mightform Harmonizer, which doubles a creature's power on each landfall. Ghost Vacuum is not a blocker. It is a cheap artifact that exiles one card from a graveyard each time you tap it, so use it to blunt Icetill Explorer's land recursion and to exile Esper Origins from their graveyard before they can flash it back. Elspeth, Storm Slayer's 0 ability puts a +1/+1 counter on your whole team and grants flying until your next turn, letting you race or stabilize past most of their creatures (though Sapling Nursery's Treefolk tokens have reach), while her −3 can remove a Mossborn Hydra or similar threat with mana value 3 or greater. Enlightened Confidant is too fragile to profitably block their big creatures, and one Liliana the Faultless is enough given the deck doesn't face much targeted removal from this opponent. Focus on going wide and tall with lifegain triggers to out-size their ramp threats.