I always do deadlifts first, I've never noticed a significant drop in any other back movements.
Same. I actually get much more out of my back workout if I deadlift earlier because I get so focused mentally. Always been my fav exercise and i'm pretty strong on it. I typically go 135 for 10, 225 for 8, 315 for 8, 405 for 8, 495 to failure. When i was 12 weeks out i pulled 495 for 10 reps weighin 240lbs. I'm 3 weeks out now and weigh 202lbs but still managed 7 reps with it last week. I usually find the days where I don't deadlift my rows aren't as intense. When I go from deadlifting 500 to rows with 315 then the bar just feels lighter in my hands and im stronger.