Here's the real question.. If you are determined to RuneScape gold get a 1h wep, get an Longsword (get the most powerful longsword ) you can choose from... If you decide to go with lvl 20 atk str, def, and str as i suggested, you could use the marmo-thingy (or bathus) metal to make your armour and wep. However, keep in mind that u will must unlock the complexity 6 or so to make armour.
With those numbers they won't help you get into a decent team to play gwd or anything with a lot of players, unless you are in massive. Barrows are my top recommendation for purchasing 70 mage and range for a black salamander. What you can do with the melee brothers is cast ice burst, then stand diagonal to them , and then you can mage them with the salamander . This will take two hits.
Then you walk behind the sarcophagus and burst then repeat. Kill ahrim and Karil as you normally would. Inventory includes runes (and the melee weapon (and shield if you wish), spade, 3 pray pots, dhide to an ahrim in case you do not pray for it, and the rest is food.
There's likely better alternatives for these. 30-35 on the Gnome course. 35-52 on the course of barbarians. 52-75 at the wild course. I'm not sure what you mean by this however, gold charms are typically the cheapest type of gp/exp. As they are also the slowest ex.
At this point which you're at, all that you have to do is use gold charms however, you can keep any blue or crimson charms you find as they are very good leveling up. Fire giants and Hellhounds both have a large supply of gold charms. Slayer is an excellent thing to take part in fire cape buy osrs. Herb runs and kingdom of miscellania provide a steady income that really adds to.
The Wall