MonsterSpawn_group Improvement on the MapNumber function

I would like to ask developers to have the ability to define more than one map in just one index of each group, there are invasions that we want to control by the file that when starting should occur in up to 3 different maps, for example: White Wizard that occurs in 3 maps simultaneously.

Because of this I would like to ask the developers for the ability to be able to set more than one map per group if possible, an option to set RandomMap="0" to non ranomic 1 to simultaneously.

MapNumber="0;1;2;3"

Example: Lorencia, Dungeon, Noria and you should if set RandomMap="1" the raid would start on one of these maps, if set to 0 the raid will take place on all maps.