Aatrox
Essentially, Aatrox’s skill pulls 2 enemy units from the farthest position to the front line. This skill helps players quickly deal with backline carries to eliminate the main source of damage from opponents.

A small tip for players to effectively utilize Aatrox is to place this unit on the opposite side of the opponent’s main carry. It is true that Aatrox’s skill can be countered by the Quicksilver, but it is very rare for players to equip this item on all main carries. By positioning Aatrox this way, this champion will always pull at least one enemy carry to the front line.
Morgana
This unit is extremely powerful in adding damage to spell-casting team compositions. The reason lies in Morgana’s skill, which reduces the magic resistance of opponents by up to 40% in a very large area, making even Quicksilver useless against this effect. If you have plenty of items, a Morellonomicon on Morgana will help your team deal an immense amount of damage.

Morgana can be effectively used in any team composition as her skill is inherently versatile. If you have to face off against excessively strong Bruiser or Vanguard compositions, Morgana is a valuable choice for victory.
Azir
In addition to his area knock-up skill, Azir’s Sand Soldiers are a great addition to compositions with few frontline champions. Compositions like Zed – Soul, Assassin – Soul can effectively use Azir in the late game to buy extra time for damage-dealing carries. With clever arrangement, you can use Sand Soldiers in the front line to “bait” dangerous abilities like Sett’s Arena Destruction, for example.

If your front line is already strong enough, Sand Soldiers also have a significant effect when used in the back line. The simplest way to use them is to act as a shield for carries against the assassination abilities of Assassin champions. Moreover, with the current hot meta of Nidalee, placing Sand Soldiers at the farthest corner from this unit will prevent your team from taking too much “lethal” damage.
Lee Sin
In Teamfight Tactics season 4.5, you may encounter champions that cannot be taken down by conventional means. Units like Shyvana, Braum, Swain… possess terrifying amounts of health and strong durability, exemplifying this issue. Without a solution, your carries will waste a lot of damage attacking those units without being able to take down the enemy team composition.

The simplest and most effective solution to deal with those units is Lee Sin. The Blind Monk’s skill can kick an enemy unit off the battlefield, allowing you to instantly take down those “tanky” units. This will help your carries not waste damage and make it much easier to eliminate the enemy team composition.