Hardly. Mining is rather quick, 60-70k an hour, or 40k an hour unfocused, and easy. Runecrafting is very, very dull, aswell as having a terrible exp rate, with it's very max, at 99, being around 40k an hour. Slayer is much easier, simply because you have scene changes. Mining is 45k an hours tops paying full attention, do you even have the 99?