From specifics:
- Reaching level 49 with an xp penalty of 100 or less.
- Reaching level 49 with an xp penalty of 300 or less.


From Help death:
When you die, your experience will reset to the amount needed for the current
level plus (100 multiplied by your level). Multiple deaths will only reset
that value, not add on top of the amount needed as they used to. Deaths to
other players are exempt from the experience penalty.

Basicly this means that you can mob die only once before rank 4 to get edgepoints for
this or am I misunderstanding something?