Large cuttings are not a good idea. As it will have no roots, the cutting needs to be small enough for the developing roots to support it. If the cutting is too large, it will simply exhaust itself and die.
With Nepenthes vine, it is best to cut it into 2 - 3 node cuttings, although I've done plenty of 1 node cuttings with success, although this is best with species where the internode is long.
The closer to the growing tip a cutting is, the more likely it is to strike successfully. The older, woody parts of the vine root more reluctantly. Further, the dormant nodes on older parts of the stem are less likely to sprout.
One good idea is to cut the tip off and plant it as a cutting. After several weeks, some of the nodes below the cut point will swell into new growth buds. Once you have those activated, portions of vine with active nodes can be cut and planted.
Cheers, Hamish