Yes, even the servants. :p Though a pillar of fire would certainly hurt. The maids (not all servants but just the maids) are basically already as strong or stronger than the kingdom's top warriors. 

But yea basically if Sanguine and Oliver wanted to, they could probably declare war on all 3 human nations at once and win in a matter of days. I can post a quick power ranking rundown tomorrow once i get out of bed to give you an idea.