regular grinding won't be good in parties until they redo mobs, there are certain camps at your level, rank 30 and above there are efts by nine ivies and treespeak and then the raptors in coerthas for 42-45 as previously stated. They said they would consider adding grind camps, but it is tied to MAP redesign and we have to get that first before we can get grind parties and maybe even exp chains (rumors going around)