So I have been building a double blaze ethos spawner design in the nether. I've been getting an abnormal amount of lag. Which I know the nether lags, but never this much for me. I've tried downloading the mod : Netherlag fix. But every time I go to join a game it crashes my minecraft. So I don't know if it's because I installed it wrong, or something. I have modloader/optifine currently installed. If anyone has any way to help, please reply.