Yeah I've thought about using one of those, since the leveling speed is slightly too slow for my taste but 4x is probably too much. The fact that you can use every Type on one character means that the only thing you're losing out on by only maining one is ~20% difference between the highest and lowest race/gender combo. Which with Rebirths is really not that important lol.
But maybe that's just me. Then again I've never hit level 200.
But maybe that's just me. Then again I've never hit level 200.