I've seen a lot of people saying that Chamber is not a sentinel, or even worse, calling him a duelist. According to Riot, sentinels are "defensive experts who can lock down areas and watch flanks". Chamber's abilities let him easily stop rushes with the trap and watch flanks, quickly move from one angle to the other with his teleport and destroy teams with his slowing Operator. Those abilities combined make him even stronger. He can also watch flanks with his trap.

Now, a duelist's job is to make an entry for his team. He has to go first and clear site. Please name one of Chamber's abilities that makes him better at this than sage.