asseco
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Yes, as a second hero, you can take a Necromancer, but only when at least 50% of the Orcish territories have been cleared – then the hired hero can be sent to retire in the castle.
The second hero is only needed to gather resources, and you can also give him the "Rally Troops" skill so that he can stay in the city and recruit a few more troops. The main hero, the Druid, after getting the "Summon Troops" skill, can perfectly handle his task without foreign troops – only with what accumulates in the castle, at least until the human castles are taken, but after that, the gathered army is enough to complete the mission.
The second hero is only needed to gather resources, and you can also give him the "Rally Troops" skill so that he can stay in the city and recruit a few more troops. The main hero, the Druid, after getting the "Summon Troops" skill, can perfectly handle his task without foreign troops – only with what accumulates in the castle, at least until the human castles are taken, but after that, the gathered army is enough to complete the mission.