in a rubber monster suit
Yeah, it sounds like just aiming, and a bit of confidence. What I did is touch the arrow to the blue flame to light it, then move back the the center of the platform, so I'm basically looking straight down the middle of the moving platforms and the water fountains. Then just wait until the torches almost line up, and fire, aiming at the far one. The other trick is to just have lots of arrows on hand so you aren't so worried about misses.I assume the intended way is to wait until the platforms line up and hit them with a single arrow. But I can never figure out where the line up/where to aim, and of course, if you wait too long with the arrow lit from the blue flame, it will extinguish itself. So I think it's aiming/dexterity/timing issues, which is frustrating, because I know how to do the shrine, but I can't actually make this one bit work.
I also use a Phrenic Bow/Golden Bow, seemed to work for me.