Agree,.. though I noticed that you've not been here very long.
When you get higher rebs you'll be able to travel to different hunting grounds such as Wells, Zerana , Moronia and another place I cannot remember.
Also there is a place called Crystal Base with 4 other spawns for different levels. Im not 100% sure on the levels but I think Wells is for rebirth 200 and the first place in Crystal Base (Crushers) for reb 250.
The first 4 spawns cost donation coins/mega donation coins to travel and Crystal Base cost crystal tokens. You can get crystal tokens at the spawns inside crystal base (first time is free).
Fastest way yo collect donation coins would probably be bosses.