I'm going to be slightly biased here, but there's plenty of backlines that look very strong this coming season.
From a personal point of view, Salford's best backline would look something like this...
Locke, Ben Jones-Bishop, Sau, Greg Johnson, Mason Caton-Brown, Chase, Dobson. You could also slip in the likes of Fages, Josh Griffin, and Evalds to name a few others.
To me, it's a backline with experience and youth and is full of pace from every position. I'm not saying it's the best in the comp but it shows that a few of the 'fringe' teams also have strong squads this season. Certainly capable of upsetting any other team on the day.