Originally Posted by Alphacide
You don't even need to read his tier list for high level play. I frequently do 5v5 premades with 1650-1750 rated players, and we choose champions that we are good at and synergize well. And we normally win
This. 1000 times, this.
Cho'gath can even work well, it's just a matter of if the team comp works.
The tier lists really are more of a "what champs fit best into the current popular team comps best" than "what champions are worthwhile" -- with a small exception for champs that are 'gamebreakingly overpowered', like Xin was at his release, or if anyone remembers Shaco's release or Udyr's release they would've been instantly top-tier just because of how OP they were. Top tier doesn't mean OP, but OP does mean top tier