Since the abilities of Equipment can vary so dramatically, this will not be a list attempting to even loosely arrange the best ones by power level
Idol of Oblivion draws you a card on each turn a token's entered the battlefield, something thats near and dear to white decks
I'm talking, of course, about spoiler season for the Arena-exclusive MTG Spider-Man cards
And Nim Deathmantle is a fantastic use of extra mana to bring your creatures that die back from the graveyard
I definitely can see its limits by not becoming any better than Temur Rhinos allready is, but comparing it to the other cards since the banning of Lurrus of the Dream-Den, I think the impact of Shardless Agent remains or even increased
But for a variety of reasons (bannings, metagame shifts, etc.), those factors are no longer as pressing today