For an orc firebomb to be crafted, you'd need a bucket filled with lava, which, Mordor is a great place for lava, but they can't exactly create firebombs without iron, which they only have Orc Steel. There would be two ways to solve this situation: 1. Make the "Bucket" recipe craftable from both Iron ingots and Orc Steel 2. Add the "Orc Steel Bucket", which can be crafted on the Dol Guldur, Angmar, and Morgul crafting tables. Yes yes, the suggestion may sound stupid, but Mordor really needs a way to get buckets to withdraw lava, craft a firebomb, or drain the Sea of Nurnen, without having to exit Mordor or it's sub-biomes.