Mysql high safety implementation (replication or separate writes or something...)
The simple answer - You need Galera or NDB cluster 

This is very simple form of answer, because new problems could come after this. 

Some often "next" questions from projects - all was fine on my old server, but now my UPDATE of 5000000 records - always fail! 

Or - I have 3 nodes, but my insert start work much slower, help me please! I just every few minutes run SELECT GROUP BY over 500 000 rows - but it was perfect work before.

If high safety - it mandatory, cluster + replication (or any other solution for reporting part of application - such as AWS Redshift and etc) - http://severalnines.com/blog/how-set-asynchronous-replication-galera-cluster-standalone-mysql-server-gtid

The best way - install and test!