Here you may compare Castellan equipment sets.
Click on any castellan name or hero to see the pieces and gems that combine the set.
To make a comparison between two castellans, mark one or more castellans (using the "compare" checkbox) and then click on "compare" button. You will be able to see for each of them what would be the maximum values for each attribute when that set is upgraded to max. This will help you decide if you want to invest coins for upgrading (or if it is worth buying the set with rubies or silver/gold coins).