JMS: The Countdown begins..

The experience to HP ratio won't be as bad in JMS, since we do get the 125% increase in experience. It's 133k HP for 6670 EXP from Fire Guardians in KMS, while in Japanese Maple, it'll be 8337 EXP. That's roughly the same you'd get out of Skelegons in KMS/GMS/every other version with normal exp rates. In GMS, Skelegons are 80k ~ 85k for 4,500~4,750 exp, am I right? So, it may be a little less than skelegons, but solo for melee classes, it won't be TOO bad.

Fire Guardians : 133k HP for 8,337 EXP
Skelegon/Skelosaurus : 80K/85K for 5625/5937 EXP

So that's 48K ~ 53K HP more for 2400 ~ 2712 more EXP per monster when training on Fire Guardians as opposed to Skelegons/Skelosaurus.