Stats are all serverside, even though you may see signs that make it seem like it's working, trust me, it's not. Speed is the only one you can actually affect. But, for example if you increase your attack stat and kill something, to you it may appear dead, but check your XP and check for drops, I can guarantee that it didn't actually die, the monsters are handled partially client side if it weren't then think about how much more stress that'd be on the servers. Stat Hacks are useless in Rotmg, simple as that.