Infinity Edge
Almost forgotten in Season 4, Infinity Edge is proving to be extremely powerful at this time. Teamfight Tactics players have realized that this item is an exceedingly effective tool for increasing damage output on melee champions. At maximum stacks, this item can provide the unit that possesses it with up to 50% damage output and 50 armor/magic resistance, which is a staggering amount for just one item.
Additionally, Infinity Edge interacts incredibly well with strong carries in top meta compositions. With the Spirit-Assassin team, Diana utilizes Infinity Edge exceptionally well as her balls stack damage very quickly. Robust units like Tryndamere, Katarina, or Duelist champions like Fiora, Jax… with good survivability also interact strongly with Infinity Edge.
Chain Vest
With the current meta where Infinity Edge and Glove of Power are frequently combined, Chain Vest is the strongest defensive item. In addition to dealing magic damage when attacked, Chain Vest also reduces critical damage that the champion possessing it takes. This makes champions with Chain Vest difficult to eliminate and allows them to survive much longer in battles.
Besides frontline champions, players can use Chain Vest on carry positions in some special cases. For example, if you encounter a team composition revolving around Aurelion Sol with Glove of Power, you can completely equip this item on your carry to ensure survivability. Even when facing annoying compositions like Assassin-Spirit, equipping Chain Vest on backline units is not a bad idea to protect them.
Gauntlet of Power
Even after being nerfed (the healing and damage increase ratio decreased from 45% to 40%) in patch 11.2, Gauntlet of Power remains an extremely strong item that players should equip immediately. This item provides a vast amount of damage or healing and helps your carries become significantly stronger when equipped. Remember, this item simply increases the amount of damage or healing based on damage output. Therefore, it can be effectively used on both physical and magic carries.
This makes Gauntlet of Power suitable for most current carries in Teamfight Tactics. From older champs in the first half of Season 4 like Yasuo, Katarina, Veigar to new units in patch 11.2 like Tryndamere, Aurelion Sol, Shyvana… all can effectively use this item. If you are looking for a way to quickly increase damage and healing for your carries, Gauntlet of Power is a brilliant choice.