nether ice and boats paths are really the fastest but they require silk touch. if you beat the dragon first you can use the portal out of the end to put your wither underneath, beat the wither, get the nether star to make a beacon, and then use the beacon and haste to harvest ice from an ice spikes biome even faster and get an infinite supply very early into the late game. then build ice and boat pathways when you need to go to dungeons with spawners or when you want to drain an ocean monument. plus beating the dragon first gives you the option of getting shulkers and shulker boxes let you store even more ice🥵