1. The Detonator

void trigger_explo(ENTITY* explosive) // Will set the Flag of the saved entity to 1
{
   [...]
   set(explosive,FLAG1);
   [...]
}

action detonator()    // Has stored all explosives-pointer in its entity-skills
{
   [...]
   my.skill1 = spawn_explosive(); // create explosive and save its pointer
   while(1)
   {
      [...]
      if(i_want_to detonate)      // check if eg. button for detonation is pressed
      {
         trigger_explo((ENTIY*) my.skill1);
         [...]
      }
      wait(1);
   }
}

2. The Explosive

void detonate_ent()   // aoe damage and shrapnelspawning
{
   [...]
   ent_create("shrapnel.mdl",my.x,shrapnel_func);
   //you.parent = me;
}

void explosive_ent()
{
   [...]
   set_stats_from_other_source(source); // With this function i save the stats of the explosive and the generated shrapnels in skills of this entity 
   
   while(1)
   {
      if(is(my,FLAG1)){detonate_ent();} // i just would like to avoid many entities with short loops that check only for one changing flag
      wait(1);
   }
}

3. The Shrapnel

void set_stats_from(ENTITY* from) // all properties of the shrapnel are save in skills in the explosive_entiy
{
   my.skill10 = from.skill10;
}

void shrapnel_func()
{
   set_stats_from(you); // get stats from your creator
   [...]
   while(1)
   {
      do_stuff();
      wait(1);
   }
}

I know i can avoid the whileloop if i run detonate_ent() inside the detonator action. But then you would point to the detonator and not the explosive.
It would work if i save the stats in detonator.skills instead of explosive.skills, but i want to avoid that if possible, cause i dont have enough free skills if i want to support the number of explosives i need.