NPC classes and npc health

[PETREKILLAH]

I've been trying to make two custom hostile npcs that have different amounts of health on my server. I've been modifying health through the skill.cfg but I've run into a problem. The problem is they all inherit their health from the combine soldier class. I noticed in the skill.cfg that combine guard and combine elites among other variant of the combine soldier have their own health values, yet when I spawn them in they come up in the console as npc_combine_s. Is there a way I can assign my npc to inherit its health from the combine guard or elite so I can have my two npcs have separate amounts of health?
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