I guess this was due to the way you wanted dragons to target the final orb on the dungeon but I believe you also changed the way Sorcerers can target the final central building on a base.
It used to be on the base of the building and now its only at the top of the castle.
This created a big issue for sorcerers as they now take several seconds more to kill a base than warriors or hunters and this has a huge impact on Atlas…
Please consider reverting back to the previous targeting method for sorcerers on the final building as this is not fair for players who invested in sorcerers and it will soon create a 'no sorcerers on Atlas"rule…thus damaging the balance between dragon types and player preferences. .