Please offer some advice.

If there are 2 heroes in the army with resurrection (or necromancy) skills, then after the battle, the army is resurrected (replenished with undead) based on the highest skill level (or the amount of experience points raised - which also depends on the hero's level) or based on the total amount for both heroes?
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I tested it myself and found the answer - only one, the highest skill level, is applied. If the skill levels are equal, it applies to the hero who is listed first, regardless of the hero's level and the amount of experience points raised.