Using a default persistence profile and iRule persistence on the same VS

Hi , I have a "mirror" issue. I have a vip with a default pool and a default persistence profile. I need to write an iRule that select another pool for some clients that are listed in a data group but I have to be sure that the default persistece profile is used for those clinets as well. Will I get the result just omitinng any persist command in the iRule? Unfortunately I need both mirroring and croos service persistence that are not configurable with the persistence command ..
Regards

MM