Glimmer of Genius is fairly difficult to assess
Great, now Ive got to drop my Blood Artist before my Ghave combo is set up, or else the Triplets player will just take it and Ill have no out, and, Awesome, Ive got to cast my boardwipe now or else the Triplets will take it from me next turn, even though I was saving it for after XYZ happens, are both thoughts that have entered my mind unabated when playing against Sen Triplets
Free spells off the top are always good and it becomes great when you build your deck with that mechanic in mind
Little did I know that the technology already existed, or would soon exist, to get over three times as much recursion, and average nearly 7 full Knuth arrows for every single card in the deck
Then I found out the top theme on EDHREC was Ad Nauseam