For f2p, strong hold of security level 3, spiders that are level 51.
For members, strong hold of security level 4 with the ankous. Make sure to bring bones to peaches tabs. (15 tabs conserves 15 inventories of food, with your combat, you're good to stay in that area for at least 4-5 hours). The drops also increases almost exponentially in ankous for p2p (a good 2 hour camping there can give you 1-2m at most, but mostly 500-700k).