Training place for lvl 38~45 and more...

But beside Fire Circle is very weak because they are not weak to fire... And If i will go to Block Golems it will be stronger... :S

Stronger doesn't mean faster. It will only be faster if you can kill more of them in the same amount of time. You have to consider how much moving around the map you need to do. Mutaes will require very little movement. Block Gloems is a lot of ladder climbing. at lvl 40, I was gaining 1 level every 25 minutes on 4x at Mutaes. I skipped Wyverns altogether because the amount of time wasted trying to get to the plats didnt make up for the increased experience. Killing 10 Kents at 1600 exp every 10 seconds (the spawn tick) is better than killing 5 Wyverns at 2500 Exp and then having to either wait for the spawn tick or climb to a new location. (The spawn for red wyverns is 3 per plat, making it a waste of time trying to climb up and down the map. At best, you can kill 2 plats per tick. Even with spawn buildup, it never does equal Kents at high speed, but it does make for a break from the tedium.)

Newties has the same problem. You spend your time trying to get around the map and not get knocked off. Otherwise, you spend the whole time at the bottom killing only 4 targets. and getting hit a lot. (Flame wheel makes newties more tolerable since you can wipe out a whole plat in 2 shots. Same with skeles.)