[PvK]

Yes. There are several types of units whose equipment doesn't involve much, but they shouldn't be fast to mass-recruit for other reasons (training, etc.).

In the case of your revived tomb guys, perhaps the autosummon mod mechanics could be used - a special reviver priest type unit would have a command that would only recruit so many per turn. The reviver could either be recruited, summoned, or be a national starting unit or hero.