This comp revolves around 3 starring Sett as your main carry. You surround him with more Brawler units and things like Abomination to create a very strong frontline.
Go for this comp if you find a good amount of copies of Sett. Having good items is also important, but shouldn't be too difficult to make.
Level up to 4 early if you want to start a win streak. Level up to 5 to try and continue the streak.
If you're weak in the early game, you can opt to save gold and lose streak instead.
At Round 2, level up to 6 regardless of your start. Put together the strongest team you can.
At Round 1, level up to 7. Roll a bit to stabilize your comp if you are weak.
Once you are level 7, begin slow rolling for Sett 3. After you find him, look to hit level 8 and complete your team comp.
Sett items are the priority, but you should also look to itemize your Abomination units. Abomination will help a lot in the mid game, and having an item like Sunfire can help you buy time in order to find Sett 3.