Good luck...But you should go further than mage and prayer, make some money and cannon to 99 range....Then if you have the time and patience, go to pest control, and fix fences adn stores for Pest points, spend it on attk/strength/defence, then go and gather charms either with a cannon or pickpocketing those guyz and max out summoning 2...and while ur training range train slayer with it.....
99 attk/99 strength/99 defence/99 range/99 mage/99 prayer/99 summoning/99 slayer 10hp...that'd be the shit