So I’ll cut right to the chase here. Basically, the best way to farm Ender Pearls is to get yourself an ender sword. These can be found in random loot chests in villages, dungeons, etc. Once you have one, go ahead and enchant that thing with Loot III, Unbreaking III, and maybe even Fire Aspect II… why not? The ender swords prevent endermen from teleporting so it’ll be easier to kill them quickly. I’ve run into the problem where they teleport while I’m fighting them, die somewhere I can’t see because the fire from Fire Aspect II kills them when they’re out of sight, and then their drops are as good as lost! Rinse. Repeat. Boom. Ender Pearls.