Most Brutal Season?

Please don't post any spoilers or anything. If you haven't caught up on season 30 I have a slight context spoiler below.:

I'm new to the challenge, currently up to date on The Dirty 30, and I just started a random season (Season 27) to watch during the agonising week it takes for new episodes of 30 to be on. I just wanted to get a feel to see what a hardcore season to watch would be. Anything from: dirty gameplay, tough competitors, vicious rivalries coming to a head. Great moments similar to when Nelson and Hunter, two allies, were forced to face each other in elimination, and both give it everything they had in a brutal competition. Also, as stated above, I'd appreciate as little info as possible about the season. Maybe just the number or season title.