When I was last P2P I sold most of the equipment. So I have a sum of cash to spend on items. However I need to spent my money wisely, so I can make more money. It has been a long time since I was last P2P and unsure if my money making methods are still good for my level (see below). I spent most of my money making time at barrows when I was last P2P.

So basically what should I kill? and what equipment should I buy?
*note* I am on a budget here. I have 15mil to spend. I seemed to have kept some items. I have.. a whip, full guthans, helm of nezzy, staff of light, soul cape, dragon boots, dragon defender and barrow gloves.