Problem is the knee flexion and the fact that most leg curl machine suck dick
If you have a lying leg curl machine with a break in the hips you can use that
Otherwise I'd do leg curls standing up with resistance bands or cable station
+ any hamstring exercise you can pile a load of weight on
I tried nordic curls before and they sucked balls, I could only do negatives lol, the concentric cramped my shit up pretty bad but I guess if you kept that them you'd get half decent at them but I don't think they are as good as GHR or RDL + leg curls