So I'd say in review:
#1 Benji commits to the dummy, forces Marsters to come in on Ponga, Nofo burst out for Ross and Ponga picks it. Perhaps Nofo can stay out and let the cover take the centre. So I'd say Benji causes the main problem but Marsters and Nofo manage to take nobody, i.e. you need to be faster if you are going to cut players off.
#2 Benji again I reckon, comes in too hard on Pearce, but nobody is sliding… I thought Tigers were a sliding team in 2018 rather than an up-in edge defence? If Benji backs off, Rochow covers the inside and Nofo isn't caught so far inside his sideline. I will say however I feel Nofo is still over-committed here, he doesn't need to be 10 m inside, there's no chance he'll get to his winger if they cut-out. Marsters needs some opportunity to turn and chance, but he'll never reach the winger. Any surprise both these tries are rapid cut-outs, like Knights know Nofo will come in?
#3 Short side, we had the numbers and though Benji gets clipped I don't think he makes a mistake here. Marsters focuses on Pearce (?) but fails to cover it and Nofo only has eyes for Ross. I'm still pretty annoyed that Nofo gets beaten on the inside because he doesn't look at his winger at any time, even in the scramble.
So overall is Nofo just to blame? Certainly not. Problem is for me, the inside defenders are often likely to make a defensive error, because whenever teams run these plays they have an overlap. Thompson on play #3 goes into the line for exactly that reason, because if they pull in the FB or stack some backrowers then you are short-manned. But Nofo turns like the Queen Mary, so even if his inside guys make some tough / wrong reads, he has very little ability to recover, because he comes in too hard.
The cover is rarely going to reach the winger, you need to come up and then slide if you see the have the numbers. Again, we seemed to be playing a lot of up-and-in defence on RHS this evening, which I thought we had started to move away from in 2018.