These are the items that Legends Arena players should combine in every match at the current time.
Morello's Evil Tome
Despite Riot's nerf, this item remains incredibly powerful and should be included in every match. Combining this item with champions capable of dealing AoE magic damage can prevent many enemy units from healing. This is particularly important as Artificers are still valuable, even with the shift towards reroll strategies where less gold is invested in them.

Trap Claw
Trap Claw is indispensable for ensuring the highest safety for your carry. In reroll compositions, where only 1-2 units deal damage and act as carries, having Trap Claw can prevent the carry from being eliminated too early. Remember that Blitzcrank still exists in season 6, and helping the key unit avoid being pulled towards the opponent is crucial. Whether you play Assassin, Duelist, or Sorcerer compositions, assisting the carry to evade crucial abilities from the opponent can change the course of the game.
Despite not directly providing strong offensive or defensive capabilities to the champion, Trap Claw remains an essential item to include in the current meta. Typically, in a reroll composition, only 1-2 units are equipped to deal damage and act as carries. Therefore, players tend to allocate all damage-dealing items to that unit, making it vulnerable to being eliminated before dealing sufficient damage.

To ensure the highest safety for their carry, players need to have a Trap Claw in their composition. Remember that Blitzcrank still exists in season 6, and helping the key unit avoid being pulled towards the opponent is crucial. Whether playing Assassin, Duelist, or Sorcerer compositions, helping the carry evade crucial abilities from the opponent can change the course of the game. Indeed, nobody wants to invest all their money into one carry only to see it eliminated too early.
Bowl of Power
Mildly speaking, Bowl of Power was the hottest item in patch 12.1. The reason is that this item provides your composition with a massive amount of skill damage stats and helps players have additional magical carries in the team composition. Not to mention, Bowl of Power interacts extremely well with the strongest composition at that time, the Inventor, where units like Orianna, Zilean, and Jayce make excellent use of the stats it provides.

Moving to patch 12.2, the hype around the Inventor team has diminished, but the power of Bowl of Power hasn't changed much. Even though the amount of skill damage provided by this item has decreased, the stats it offers are still significant. Moreover, compositions like Swain - Empire, Sorcerers - Yordles, which deal strong magical damage in reroll strategies, are still in the meta, giving Bowl of Power more opportunities to shine.
