TransportClient vs Cluster Client

Hello there! I usually have my clients configured as transport only
(testing), but now, moving into production I like the fact that cluster
clients do not require a host address configuration. My production
deployment will look something like this:

3 data nodes with 0 shards and 2 replication factor (the index is really
small, we are actually using ES as our TokenRepository for auth)

And around 70 clients executing GET operations on those nodes.

I just would like to know if having 70 client nodes in the cluster could
cause any networking issue, or unnecessary overhead on the servers.

Regards

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