The three groups that rotate each season are as follows:
Arc Reactor, Avengers Tower, Black Widow's Batons, Chimichanga, Cull Obsidian, Destroyer Gun, Element Guns, Kimoyo Beads, Lucky, Mirror Image, Sanctum Sanctorum, Stormbreaker, The Blackbird, The Tinkerer, Vibranium Ore, Yaro Root
Hulkling, Hydra Henchmen, Korg, Kra-Van, Lockheed, Proxima Midnight, Quantum Realm, Quinjet, Royal Talon Fighter, Sp//dr, Sharon Carter, The Dora Milaje, The Milano, Vintage Shield, Web-Shooters, Wong
Ancestral Plane, Atlantis, Carol's Communicator, Chewie, Corvus Glaive, Ebony Maw, Hope Summers, Pocket Radio, Shuri's Lab, Spider-Sense, Stepford Cuckoos, Taskmaster's Sword, The Carol Corps, Vanessa Fisk, Victorious, Wasp Gauntlets
Hope this info helps in figuring out where to invest! We are currently on the third group.