found the best way to get money m8 is go for yellow aggro 2 tier up or above creatures solo-ing. And no, it's not easy to kill them, but i have found if you can get into a rythm with them, u can kill 1 about everyone 2 minutes and u generally get a rare drop everyy other kill. Depending on your lvl depends on the money you get, but if you're high enough for it, the orcish wastes are ideal for this. Plus you get to lvl up at not too bad a pace either, about 1% for each kill. You then just sell the drops at the brokers for generally 4 or 5 gold each, so do the maths.
Last time i did this i made just under a platinum piece in about a 2 hour stretch, which is about the best i've done money making. I think the developers must have put some code in to drop good items at a higher ratio when you kill things that should really be too hard for you.
P.S - I am a warden and the only way i managed to kill yellow 3 tier up is by using my ensnare which roots them in place just long enough to cast 1 decent heroic strike combo and 1 extra spell on top, which is either an extra DOT spell or a heal. Best tip i can give is make sure you have good food and drink and when u attack the monster, pull him back out of the aggro zones so you don't get mauled from behind. Fighting creatures this hard can be a very bad experience if you aggro more than one(in other words you will die unless you have evac or some such spell)
hope this helps
