Hmm, what would be the lazy mans trio?
I'm gonna go with Moving
(the kind of stuff a guy would need to be able to do in a medieval-inspired environment). In Dungeons and Dragons terms we're looking at Telekinesis, Fabricate and Create Food (eventually Hero's Feast).
IIRC (away from books), Spellbound: Chaneller had Mage Hand I-IV and Telekinesis I-II, which covered the first part, and we already have Goodberry / Hero's Feat for the last.
Building / Fabricate is harder (especially since it was OP as all get out, if used creatively, in D&D). Unseen Servant does a little of the process - every lazy mage wants an automaton to cook, clean and make ammo - but doesn't cover "Here's a pile of timber" *Fancy Dance* "Here's a ballista" type action, or Pile of Ingots, *Boom*, Armour. I totally get why those sorts of effects weren't in Spellbound: Seer, or FC Core - they're just so damn powerful and versatile that having one spell do it would break the game. You also don't want Mages to make mundane craftsmen pointless by their mere existence. Kinda a rock and a hard place - it's kinda core to source, and it's hard as hell to balance. I don't envy you, Pat and Alex.
If I'm allowed a 4th, then I'll add Chill Touch / Polar Ray, because you gotta have a cold
EDIT: Ninja'd by Jim on the chilled beverage...
@Jim: D&D had Prestidigitation that let you clean cloths instantly. Best 0 level spell ever because that is just pure cool
. And that's why we play casters, right? To be cool? It's like the 1 point Perk in GURPS that lets you always have your suit look good - always worth it for a spook.