Don't know much about T-182, but from an engine management point of
view, shouldn't a lower RPM, higher MP, and lean mixture work better
for the engine during the approach? That way you keep the BMEP high,
cylinders warm, and plugs clean.

I, too, would suggest a higher MP, lower RPM.

If your instructor warned you never to run you engine "oversquare," he
was very seriously mistaken, and gave you bad advice..

vince norris