Also, the reason it’s “as effective as power word kill on common folk” is because common folk are weak and meant to weak. They’re not heroes.Fly swats are overpowered because they're as effective as a machine gun at killing flies.
The original Boblin comic did have the party interrogating him for an hour, but it wasn't out of suspicion.https://i.imgur.com/KEgaxr0.png
Various summoned or controlled creatures, such as constructs, undead or elementals (see myrmidons), depending on the wizard's preference or specialty.
That puts big fancy things like resurrection well out of reach then. Probably some basic martial abilities, with a bit of healing and buffing.
Most countries have varying sizes and tactile features to distinguish denominations.