TFT Set 4 was released recently, this post will give you 4 example team comps that you can try in rank.
You can find the Cheat sheet here.
8 Brawlers +3 Elderwoods
This is team comp is really easy to build, which you do not have to think much. Just buy all Brawler that you can see. If you are lucky, you can have a Chosen Champion and complete a full 8 Brawlers synergy. Only then, you will become super tanky while Sett and Nunu can deal tons of damage. In addition, Elderwood synergy gives you the ability to heal in the early game.
While Sett is OP, 8 Brawlers help The Boss dealing damage around the field in the late game. You can also use Ashe to complete Elderwood and add Hunter for Warwick. However, she is a weak Champion, who can be killed easily, so you must think about items carefully before use on her.
4 Brawlers + 6 Elderwoods
This is actually a different version above Comp. Instead of 8 Brawlers, you only need 4 Brawlers but need 6 Elderwood. This team comp reduces tank at the frontline but the whole team has a powerful ability to tank and heal at the same time.
However, in order to achieve this synergy, Sett must become Elderwood, or else, you must replace Lux with Hecarim and Veigar.
As same as Brawler, Cultist synergy is a simple Comp, you only need to buy 8 Cultists then you win. This comp has the ability to hold health very well in mid-game with super tanky Galio, meanwhile, Kalista, Evelynn, and even Aatrox can deal tons of damage.
Of course, in order to have all 9 Cultists, it must be very lucky to get a Chosen Cultist and upgrade to level 8 to get Zilean.
6 Sharpshooters + 2 Mystics + 2 Vanguard
This is also a super strong team comp with the ability to clear the enemy’s team really fast. However, the disadvantage of this is low HP at the back while the front is not tanky enough. But if you can get Chosen Sharpshooters like Vayne, Jinx, or Teemo in early, you can consider this team comp due to its simple use. They only fear of their counter: Assassin or Shade. The hard carry of this comp is Jhin, most of the damage comes from him, but if you do not have the right items, you can roll Jinx or Teemo and use them as carrying.
You can find more guide here.