If magic was fact
OSRS Power Leveling which will hurt more, a massive ball of fire hitting you in the face or an arrow? YET WHY ARE MAGES THE WEAKEST IN RS? Runescape makes magic the sublet form of battle, freezing enemies and then hammering them, against warriors this can let's win battles, but archers, we are continuously turned into pincushions. We've got splitbark, that won't cease descent of dragons, so that will not prevent a bolt breathing flame over us; it won't ever cease a blue bow which costs less than 1k! That is my suggestion on magic...
The answers. RS has a number of solutions that could be utilized, heres what I could see. NOTE: Magic isn't just a battle ability, but it still deserves to be a powerful force. It may start strong, but wow I got a steel long isn't that satisfying. This really is a solution, but a very difficult and will get yelled at one, I am saying it for arguments sake. In case melee armour was resistant to mage, warriors would need halting to kill, but it still may be done, rangers would then be vulnerable to spells. Obviously this would not be liked, doesn't make sense so I am ignoring this.
New spells: This can be easy, either a new rune above blood dropped only by slayer creatures. Magics own abby whip or black bow. If this may hit 40s individuals would use it. Another one I thought would be fine is a spell which uses all four ancients at the same time. It might need balancing but could do the job. Subtly alter ancients: This is simple, change ancients a bit. This is an easy one to change the mages battle
Cheap RS3 Gold magical. The changes would be easy, adding on to ancients.