When I'm in a crafting 2000 furnaces competition and my opponent is
https://www.youtube.com/watch?v=nfvr5g8ght4I watched about half of this and then skipped forward, it seems the strategy is to get to the end as quickly as possible and then use the "end portal breaks all blocks when an entity goes through" to make a huge cobblestone generator in the end and craft all the furnaces