You can apply more than one strategy in the same inheritance hierarchy.
The transformation of entity classes with the Generate table transformation type will not change. But transformation of entity classes with Migrate column transformation type will be slightly different. If entity classes with this kind of transformation type have both their super-class and sub-classes with the Generate table transformation type, the columns transformed from their persistent attributes will be migrated into tables transformed from sub-classes. The migration to sub-classes has higher priority.