Combined might of the top heroes of each type controls the maximum level that the Workshop can refine armor as described here 
Sanctum level boosts Hero ATK and HP in Fortress Feud
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.