How to better backup MySQL 5.6 database?
Better choice is to depend upon a backup utility with which you shall configure backup frequency, etc. be it two slaves or...


Alternatively...


If you have enabled mysql log, you shall pretty well re-create those entries since mid night backup till the current time by running all the pertaining queries. 


2a. Either you shall revert the whole data to midnight backup and then run the rest of the log to re-create all and getting upto the current level

2b. Or you shall revert the particular data table to midnight backup and run the rest of the log (by screening the queries).

Depending upon your database / program flow structure you may choose any one of...