^Building into a Philsopher's Stone FROM a Regrowth Pendant is so much more beneficial IMO. Why?
Regrowth = early-game regen. More survivability and less recall.
Stone gives you +5 gold/10 seconds. If you have greed from utility, you gain 6 gold per 10 seconds, which would give +32 gold a minute. Pretty good if you ask me.
And it also gives these stats~
+22.5 Health Regen per 5 sec +10 Mana Regen per 5 sec Passive: Gain an additional 5 Gold every 10 seconds.
Gibs good HP and MP regen. And eventually pays for itself.
A lot of Ashe's gank ability comes from her infinite snare ability and her 75 CD ult.