First of all: I don't need advice how to create LOD for Skyrim.

But:
I am working on the conversion of an architecture tile-set from an Oblivion resource to Skyrim. Now each of these Oblivion pieces comes along with a _far.nif, for instance: guardHouse01.nif is accompanied by guardHouse01_far.nif. I suppose these _far.nifs are equivalent to those _lod.nifs in Skyrim? And are they needed to create LOD in Skyrim?
I found only very few of those _lod.nifs in the Skyrim BSA (like farmhouse01.nif and farmhouse01_lod.nif), but many more architecture Nifs where a BSLODTriShape is part of the Nif.

Now my question: There is a big amount of those" _far.nifs" in this Oblivion resource. Does it make sense to convert them all (*sigh*) or is the LOD in Skyrim calculated from the BSLODTriShape in the Nifs? And if the latter applies, does it make sense to continue with working on the conversion - not having those BSLODTriShape in the original Nifs?