What's your budget?
Construction is the fastest to level to 99 than every other skill if you can afford it, it's about 105m. The XP begins at about 180k / hr if you do oak larders, and then goes to 220k or so / hr when you get to dungeon doors (74 con)
Pros:
- Least people have this 99, so your cape won't be another noob cook one.
- A nice house is great for house parties to just chill
- Can make all tele tabs for great cash, actually, is the fastest skill-related money making method
- Feel sexier than having a cooking cape
Cons:
- Expensive (not as much as summoning though lollol)
- Not much use outside of having parties and making tele tabs (oh but isn't cooking and fletch pointless too?)
- No one will agree with me.
Money-making potential of each skill:
Fishing: Nowhere near con because I doubt you're going to fish 700 sharks in an hour.
Fletching: 120k / hr tops.
Slayer: D boot and whip drops have been nerfed. Before you would average about 1.2m / hr, but now don't even expect half of that.
Crafting: Um I wouldn't know, isn't this a money loser?
Smithing: 120k / hr or less (Unsure, but cannonballs are slow as hell and boring)
Hunter: at 80+, maybe 600k / hr if you're lucky, but most of the time you're wrestling with noobs to get a chin spot