Best way to train model for Solr LTR

[Zheng Lin Edwin Yeo]

Hi,

I am using Solr 7.4.0, and I would like to find out what is the best way to
train the model for the Solr Learning to Rank (LTR)?

So far these are the ways that I found:
- LibLinear, LibSVM
- LambdaMART
- RankLib
- NDCG

Regards,
Edwin