he knows really well how to hold down a site. Survive as long as possible and be a rat they cannot get their hands on.
On offense his lurks obviously have great timing and just very smart.
Obviously if alfa peeks down long he is gonna fry much harder than nats sure.
Personally i have been arguing for a long time to put alfa on duelist. even ini or flex would be better than senti.
If i already have great firepower on the team i for sure pick nats in senti role.