Personally, I would (if you don't mind clicking) use crumble undead. The other easy way if you don't want HP xp, is to use telly to camelot. If you can't use that, then use firebolt. Of course I recomend making your own runes, for the xp. The best way is just stick to it, and don't stop for any reason. Whilst playing RS, just keep going.