In addition to the methods I mentioned earlier on how I made money, I will also include that buying the tier 90 components and things to add to the components also makes a nice amount of money.
Example: malevolent energies (slowly buys for ~90k each)
Malevolent body requires 42 energies and 3 plates to make, so it costs 3.78M + 1.5M to make a body (5.28M). I instantly sold one for 6.6M exact last night.
All of them have a buy limit of 10 per 4 hours, but regardless, it is a nice amount of profit once you have a ton of energies and scales.
Elf theive. Just cycling through the top 5 clans. Can't do much else anyway since I'm doing fire lines on osrs all week and that's a lot of clicking
Old School