When this set was in Standard, I owned cards up to Apocalypse and a few Odyssey cards, but I only used cards up to Prophecy. However, I was playing a lot because I was still in high school, and my opponents were using these cards all the time. Most of the Torment cards I remember were utility or situational creatures. One huge exception was Cabal Coffers. It was found in probably all of the black decks I played against at the time. Kids would be packing Drain Life or Pestilence or Looming Shade into decks, and the Coffers would supercharge those cards. They'd drop multiple Corrupts in one turn. They'd activate the Coffers, play Yawgmoth's Will, replay all of their Dark Rituals and Cabal Rituals, then play Drain Life.
Thankfully, I had Force of Will, which I put into every deck because I was playing control instead of combo back then, but that's another matter...
Cabal Coffers is the new Lake of the Dead, and it's better. It gives more mana and doesn't kill its own food supply. And yet it's balanced. It's one of the more powerful cards in the set, but pales in comparison to effects like Madness and Threshold.