Elasticsearch architechture

Hi! I want to use es as my resource server.
To support my users, I was planning on raising 2 servers with one instance on each server.
Configuring the two nodes as a cluster with 8 shards for future scaling and 2 replicas for better prefformance .
Also i want to set zen discovery to use unicast so that the two nodes will work synchronically.

My question is, will this configuration work for me?
How do i make sure that it works? Just by calling the indexes and check its data?