Revive Exploit / Bug:
You died...happens...how bout just continuing where you died?
As soon as you die, a window pops up that has a confirm button. when you hit the button you get transportet back to town.
Now, instead of hitting confirm, hit ALT-Z. This will bring up a window with following options: Options, Character Selection and Quit Game.
Now move that window around with the mouse, until the Character Selection Button is DIRECTLY behind the Confirm button from the window that teleports you back.
Now hit Confirm, wich will bring you into Character Selection window. there just log back in with the dead character, it will be revived with a certain amount of HP, right where you left off.
That also implies, your enemy will be there too, so either wait a bit, or run like hell

(if in a group, just continue where you left off)
Grinding two characters:
First of all, unlike many mmo's, you dont have to modify or use third party prog in rappelz to be able to have two game clients running in same window.
this allows you to create two accounts, lets say a fighter / holy warrior and a class thats harder in early 10-35 lvls to grind, like a cleric.
Now go to an area with high, if possible non-agressive spawn, 10-30 i recommend Laksy Field, any part, from 30 up ivory tower.
Now, the plan is to open a player shop with the weak character, in the middle of the area.
Just grind away with your stronger character, and if grouped both will split exp / jp
combine that with repeatable quests like the "Requests" available in the major cities, its steady grind.
Remember to open a player shop with afk character, otherwise the client will disconnect.