This thread is entirely about valuing everything as time. Within this thread, saying which slayer task is the best is about which task has the highest ratio of "hours saved in the exp you gained by completing the task", to "hours spent completing the task", factoring in melee & cannon exp,summ exp from charms, all slow skill exp and dkin lamp exp from effigies, (and yes, technically it should go as far as to value loot in saved hours making money but since many top 15 exp have little to no concern for money it tends to get ignored). Your formula may be great for you, but for a discussion of the race to 200m all skills, its inadequate.