i quit call of duty but since then i've made this blaze farm,just follow the tunnel after the stairs and its a straight path to the farm. its good to havee f3 enabled and when the entity limit is reached(250 i think) you can remove the block above the hopper and slab above the block, flick the lever kill them off then flick the lever again replace the block and slab, log out for 10 seconds and back in and repeat
