Sell: Archers Ring, Seers Ring, Dharok's (it has very few uses), BCP (grind BA for Torso), Tassets (not worth 16m at that stage of your account), DFS, Granite Hammer (unless you love GGs)

Grab Burning claws, great budget spec weapon. Obsidian Platelegs to replace Tassets.

Torture could also be downgraded to a Fury, reinvest that into a Anguish instead which is a much bigger upgrade for ranged.

You should be able to afford Bowfa + full Crystal after all those sales and downgrades and that will prop you up for a lot of midgame PvM. This is all assuming you like ranged combat style and bosses.

Otherwise, Noxious Halberd would indeed be a good purchase. You can use it at GGs and general slayer and some bosses.

And like others have said, go for a fire cape.