Because all of the data is coming together in enrichments, you will probably need larger enrichments settings than your parallelism settings. Enrichment settings focus more on the compute workload than on the mapping workload in parsers or the IO driven workload in indexing. Enrichment makes significant use of caching for performance.
You can modify many performance tuning properties for enrichment using Ambari or Storm Flux. Modifying properties using Ambari is simple and can be performed by any user. However, you should have knowledge of Storm Flux usage and formatting before attempting to modify any Flux files.
The enrichment properties materialize as follows:
Ambari UI -> properties file -> Flux -> Storm