Which one is the best to connect Mongodb and Elasticserch

These days, i found several ways to connect Mongodb with Elastic seach! But i can't still get clearly which one to use, please advice me a little?
-Mongoosastic module
-Mongo-ES connector
-Elasticsearch-river-mongodb
-Transporter

PS. my ES version is 5.3 and as much as i cannot want to make replica set!
Thanks

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