Keep on at it, you'll get loads eventually.

It's not that hard. Atm I'm taking a bunch of henchies out to SF whenever I'm on and kill everything that moves until I'm at 60% DP. Then I just warp back to Deldrimoor Warcamp and sell everything I picked up. Then I do it again.

This way I can make loads of money in a short time if I need it. For example, I made 6k last night in about an hour and a half so I could buy a new suit of armour (Necrotic). I'm hopefully gonna do the same tonight so I can buy the Tormentors Armour as well.