Servants of Valor don't summon?

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Am I missing something with this skill? I'm playing UHM, and Servants of Valor (Formerly Scourge) just don't appear when I try to summon them. Is there some sort of requirement to summon them?

Edit: I think I figured it out. Melee specialization that only allows buff/debuff and class skills, I thought it included summoning in there as well but I guess not.