First map they put Nitr0 on Breach and they play very well. Now I ask you, why did they play well with Breach and bad with Sage?
The answer is quite simple, because breach has flashbangs. 100T actually played 2 maps without flashbangs. Got destroyed in the first sage pick, didn't notice or admit their mistake and played without flashbangs again!!
The reason people pick Jett and Raze as main duelists and Reyna/phoenix/yoru as second duelist is because of flashbangs, if you want just 1 duelist, pick one that has flashbangs or have the brains to at least pick a skye or a breach instead of a Sage. How do you expect to win without throwing a single flashbang the entire round? You don't.