Hello i just got dark mage, i need suggestions on talents because i dont know if using flame guard or sacred light
He's a good hero -- can be a little similar to DK for hero sniping. However, he also targets buildings and other units.
For talent, I recommend Brute Force (for CRIT and DMG) -- offensive build /// or Flame Guard (HP and DEF) -- defensive build.
For insignia, use Wicked Armor (to increase ATK and decrease the reflected DMG).
For enchantment, I highly recommend Punishing Smite (CRIT boost and True DMG). Use ACC traits since he's a hero killer.
He's only good for offensive battles and taking down Rambard(s) on bases. He ain't good in GW defenses, in my opinion.
By the way, I still think that DK is better than him. However, both have different uses and they shine in their own way. Good luck!