Tip.It now has a Runespan guide here. You don't need anything to start runespan. If you dedicate yourself fully 99 runecrafting shouldn't take more than a month or so. I've gotten 88-99 there in a week and a half, which translates to roughly 1m~ xp a day. The basics are that nodes are better for xp than creatures, but nodes will not give you ess back, whereas a fully siphoned creature will give you 50 ess. Strike a balance between siphoning them and you shouldn't have a problem. The guide should help immensely :)