Agape: We build the minions together with the Sage user. Think of them as mini-champs. Animated undead have nothing to do with the Sage powers, unless your Sage's minions are undead. Animate dead is unlikely to be a Sage spell, but the summoner can cast it normally.
And yes, the problem with using maps online is that it takes too long. Imagine if we had a 3v2 encounter and everyone had to check both windows. Encounters could take literally 10 hours...