Money making in runescape?

I used to make most of my money on sharks as fishing is my highest skill. well, fish prices are plummeting with sharks under 400 now and idk what to do. I can barely afford to hunt for construction rocks now and am nearly broke. I have 80 wc so I could do yews I suppose but that is slow and yews are under 400 right now as well. I just want to clear a million to be able to get into my skilling again. Never was a mercher or flipper or whatever. I did try my luck once with uncut sapphs and made a few thousand but that makes me nervous. My cb is 97 and slayer is 70 so that is an option I suppose. Anyone have any good ideas for relatively fast moneymaking on rs?