Second one first... Are 'healers' mancers? My view (and I don't think canon says one way or the other yet) is no. I see a Healomancer healing entire stacks or hexes, and unit types with healing abilities (Lofty, Altruist elves) doing the one unit thing (like the panel where one was healing the rammstein daschund).
And as for the Stanly Foolamancer... where's that at? All I see is Parson thinking mancerformerlyknownasMisty was a Foolamancer. I don't see that as saying there's a Foolamancer, just Parson trying to remember everything at once and failing. And I don't see where the table would need a Foolamancer to operate. Think for the binding spell, Look for table operation. Fool doesn't fit, as I see it.