Primarily from NMZ you can get imbuables. Player can imbue every fremennik and RS gold wilderness ring to grow their stats twice. Black mask and Slayer helmet could be improved too adding to it 50% damage and accuracy boosts for magic and ranged as well. Finally it is possible to imbue crystal items to always maintain their highest possible attack stats.
There's also unique herb box which may be bought with points. Each of these boxes contains various herbs and cheap OSRS gold cost 9500 points. As much as 15 boxes can be purchased daily and each of them contains herbs that value around 10k gold. This adds up to total 150k gold every single day.