a very profitable way woudl probley be thw fist of guthix win prizes while getting free runes it is located in level 7 wilderness 55+alch to 99 it costs around 60-130mil
The fastest way of getting level 70 Defense would be Soul Wars 50/50, if it's still going.
If your not cheating, then the fastest way is to buy high level logs and fletch them. Since arrows and bows are sellable you'll be loosing only some of the money.
Keep playing. Try to get more xp by kill and skilling.. BTW its max in 120 level.
Seriously, the fastest way from level 90-99, is Soul Wars. It takes 2 weeks to get the 1000 points and every 100 points gets you a level.
For a good Runescape help site, sheck out this site It gives great tips and A skill guide for every skill is included http://runescape.salmoneus.net/hunter_help.html#level1
The bestest and fastest way is to Craft Nature Runes.
It depends whether u are member or not
Depending on what level your magic is, how much money you have, how long you going to train per day. The best way to get 80 magic is get to 55 by using superheat or if your lower level magic just some combat spells. Then once at 55 magic alch yew longbows (or something else for better profit). This will take a long time depending on what level your magic is and how many things you need to alch.
kill 1000 lvl 5 goblines
cut normal trees intil level 15 then cut oaks til level 30 then cut willows til level 70 then cut yews til level 99 then cut magic trees
You need to pee on an ice cream sundae
Do quests.