Firstly trade Horvik to get your armour for the training that's ahead of you.You should buy a Whip and Rune/Dragon Amour. Buy some food so you don't die through your adventure. You will be making some money in this adventure so dont worry, you'll get better amour.
Now you can choose 2 methods of training, Rock Crabs for fast exp or slayer tasks for money and ok exp in both combat and slayer.
Ok now, you know the basics you can vary your training methods and remember pick up all your bones because you'll get 99 prayer very fast. Also use on an alter because this gives 2x the exp! But I would recommend most to go to blue dragons because there not in the wilderness like green dragons and they have more hp for exp!
For Magic get it to 56 then alch until 99. But i warn you this will get very boring so if u like train on monsters which makes the time go by faster for me. You could also get money and magic exp at the same time by going to gwd. You can attack the Armadyl boss (With a Team) and get drops like hilts, and range amour .[b] This also works for 99 range to.
Now Slayer Is somewhat Combat so i decided to include. I got my 99 hp, str and def and attack by simply completing tasks. Sometimes u can get up to 2m a task which adds up to alot.
Good Luck and my best regards, Exodus
Ad me in-game if you like