I used an Eternal Eye in the nether to convert a blaze spawner.
Then I used a limited chunk loader (from simple chunk loaders) to load the chunk that contains the spawner, my dark utility mob killing stuff, and the chest that holds drops. When I stand nearby, everything works great, and I get plenty of blaze rods.
When I leave the nether, it stops running. The limited chunk loader burns through ender pearls. It burned through 6.5 ender pearls, which means that I let it have 2.5 hours to run. When I came back, there were no drops. I left a furnace with cobblestone in it in the same chunk, and it smelt the entire stack of cobblestone while I was gone.
The chunk loader and entire mob farm (including ender hopper and dimensional chest) are all in the same chunk.
I used an Eternal Eye in the nether to convert a blaze spawner.
Then I used a limited chunk loader (from simple chunk loaders) to load the chunk that contains the spawner, my dark utility mob killing stuff, and the chest that holds drops. When I stand nearby, everything works great, and I get plenty of blaze rods.
When I leave the nether, it stops running. The limited chunk loader burns through ender pearls. It burned through 6.5 ender pearls, which means that I let it have 2.5 hours to run. When I came back, there were no drops. I left a furnace with cobblestone in it in the same chunk, and it smelt the entire stack of cobblestone while I was gone.
The chunk loader and entire mob farm (including ender hopper and dimensional chest) are all in the same chunk.