If you have another spell you want to cast but need more lands, cast Rubble to reset three of your lands to keep your turn going
Nayas biggest strengths lie in its creatures and the value they come with
While there's no other Green cards that directly support Equipment, Green offers plenty of other things to the archetype, including superior ramp (Farseek), amazing creature tutors (Survival of the Fittest), and forms of card advantage that synergize well off your equipped creatures (Rishkar's Expertise)
As a Bolas-associated ability, it makes sense for Liliana to make use of it (since she witnessed it on Amonkhet and was forced to work for Bolas on Ravnica), plus Bolas is desparked for the moment and not able to use it
When Ancestral Knowledge leaves the battlefield, shuffle your library
Yes, its most frustrating when played alongside Alrund, but there are plenty of other spells that will leave you just as furious and helpless when played twice