Yes, it is probably blaze, as Nole said. (I was too busy answering that bombardment of questions.) However, blaze grinders are terribly hard to find and even tougher to build without proper experience or tutoring. Usually, a double spawner of Zombies/Skeletons will work quite efficiently. A darkroom spawner can also work well; however you are subject to the mob cap reaching the limit and your grinder effectively stopping.
I have a Double zombie with a Darkroom connected i can really recommend that and its on Utopia aswell
I have a double spawner in smp9 (not blaze) and i went from 22-30 in like 5min. Skeles are great if you make it a drop-trap.
I have a Blaze on SMP2 and it work pretty awsome. BUT,They are correct, You need alot of stuff and time to build one, But you do get Blaze Rods so it has a extra + in the corner If I have like 200blaze I get from lvl 1 to lvl 30 (I think)
If you need the exp grid. check here: http://empireminecraft.com/threads/going-to-the-wilderness-read-this-to-track-your-levels.8707/ it is compact cause the forums forced it like that. I'm trying to fix though.
I just made a res on utoptia and onl have 24k with no enchated picks. Somebody help me out? I dont grief. I enjoy mineing together and building things together.( Only in the wild)
