Warning: I got permanently banned or temporarily banned for doing the following.
Here are some ways to exploit the game.
1. Speed hack: Use Cheat Engine, tick speed hack and there you go, slightly lowered cooldown for normal attacks and skills. (the server seems to process your attacks if you waited for almost but not quite the cooldown, if you reuse skills with cooldowns instantly the animation will show but it will not do anything) [haven't been banned YET for doing this]
2. Weapon speed hack: Using Cheat Engine, search for the attack speed printed on your weapon in float, change it to whatever you like (the lower the faster) but it will not work if you change it too fast for the same reason as speed hacking. So lower speed slightly for it to work. [have been permanently banned within an hour after having weapon speed set to 0 / instant attacks]
3. Weapon range hack: Using Cheat Engine, search for the weapon range on your bow/gun in float, change it to whatever you like (larger means more range), this will fully work and you will be able to shoot across the entire view. A possible enhancement to this hack (haven't tried it myself) is to find the pointer for this and apply to melee weapons, you might be able to hit mobs across the screen with a sword or something. [had been permanently banned for this within an hour after setting range to 99999999 / unlimited range, i used this with weapon speed hack]
4. Teleport hack: I have not tested this enough but it seems that when you use WPE Pro to send packets for attacking a mob from very far away (say noob town Amitaba to serpant at place below second town Lumen, Unda Plain) you get teleported straight to the mob and you will be attacking it. You can also teleport to NPCs by sending packets for talking to them. I have not tried sending packets for moving but it seems that it might work, try sending a packet for moving to a certain spot. Running does not work with speed hack because (I think) the server sees the movement as too rapid, but not as too far from your original position, so there is a possibility that the server does not check your original position when you move. (hence explains the tiny teleports that you see when people lag) [just got temporarily banned for this a moment go before I posted]
5. Fishing/Mining hack: Using WPE Pro, capture the packet for fishing/mining. Send the packet to the server at once per 8 seconds. I highly advice capturing many, multiple, distinct packets to cycle because the packets ARE different each time (encryption i believe) if you do it in the game normally without hacks, so cycle different packets to hide the fact that you are macroing with WPE. I advice that you do this on a separate account to fuel the crafting of your main. [had been temporarily banned for this]
There are many other hacking possibilities such as skill cooldown hack, skill range hack, aoe range hack, anywhere banking/selling hack, etc. But be warned, you will be banned eventually because the anti-hacking system seems to be able to detect common hacking tools such as WPE Pro even if you are not using it to hack. I highly recommend that you do not try any of the above hacks on your main account and I am not responsible if you get banned.