[1.2.304] Strange items...

This is different from any other game how?

I haven't played WoW, but I play DotA and I imagine the stat system/terms are similar. Things like HP/MG regen are actually useful in that context, because you don't have an practically unlimited supply of free full HP/MP heals. Armor and spell resistance actually makes a big difference on the amount of damage you take. Things like Bash and enemy disables actually make a big difference. In MapleStory, either you die in one hit, or you live and get off with no consequences. Monsters either die in X hits, or you have an inefficient method of training. Let's take a look at the list of things that this system adds:

Damage/stat/Att increase by % - useful because it adds damage
Maximum HP increase by % - useful because it helps you survive
ACC increase by % - only useful for a few classes. Warriors actually have a decent check on their damage in this.
Evasion/Physical defense/Magical defense/Hands increase by % - useless or not worth it when the other options are so much better
IgnoreTargetDEF - next to useless because defense hardly matters in this game, but useful because it increases damage
damage resistance/reflect - useless unless it increases survivability by a measurable amount, unlike defense
Reduce the cost of spells - useless
HP/MP recovery - useless
Meso drop rate increase - useless because of how pomegranatety the in-game economy is
Item drop rate increase - okay, this one's actually useful
Skill point increase - useless because you can't break caps and most people max out the 3-4 most important skills immediately and 2 more points in Hypnotize isn't going to do pomegranate.
Proc Poison - useless
Proc Stun - useless
Proc Slow - useless
Proc Darkness - useless
Proc Freeze - useless
Proc Silence - useless

Not to mention that the stun would help Vipers a crapload due to the fact that we NEED stun for our best damage. ;s

You can't stun bosses and stunning monsters at a small rate increases your Dragon Strike damage output by a negligible amount. Won't make training any faster.