it's the opinion of most of us that siphons are a waste of time at lower levels. there's ample spirit mobs available both in the wild and in temples, so buying and using siphons seems to be a redundancy to me. of course, when you're done farming the inferno spirit population and you've got your 210-240 suit, you can farm siphons (hahahaha good luck) to get 250-270 spirits. 215 spirit bosses and 220 spirit PBs will very very occasionally drop 250-260 spirits.