Balrog

Farming Horns of Balrog
For efficient farming, have as many rogues on your team as possible. A sample wizardless farming team is:
 * Elephant with neutral gear and a pot
 * BHC with fire gear and 1-2 blue gems
 * Santa with fire gear and about 2 blue gems
 * Balrogue or Balrog-Mage with neutral gear, blue gems, and a knife
 * Two rogues, possibly Book-Rogue to catch the Blacksmith event, with knives
 * DL in the 160-180 range; CL in the upper 30s to mid 40s; all maxed and max enchant T3 gear

(If you need wizard, replace one of the rogues with Wizard)

Now that Balrog gains have been capped as of Aug 2021, the Balrogue strategy makes less sense - it may be worth it to evo Balrog into a mage to begin with and let it take a little longer to get to 900 horns.