Not sure what you mean…but you can get curves from polycurve this is ootb node and from curve to line just explode…but line to curve i use offset in this case…but you are right if you run on a big heavy model everything can go wrong 
Not sure what you mean…but you can get curves from polycurve this is ootb node and from curve to line just explode…but line to curve i use offset in this case…but you are right if you run on a big heavy model everything can go wrong