Do slayer, man.
Obsidian armor is pretty solid til you can afford better gear. Black mask it the most important thing. Start making a good chunk of cash per task once you can start getting Kurasks/Gargs.

Do monkey madness 2 asap also, the demonic gorillas are amazing for transitioning between mid level and high level pvm.

Demonic gorillas
Vorkath
Zulrah
Raids 1

Really good goals to work towards account wise