I don't know if there are partial raptures either, but I don't rule it out.
 I do believe many who consider themselves Christians, but are not living that way, will not make it.
 
In regards to Perry Stone. I did not know what you shared but I do not think what you described is considered necromancy
Necromancy is the conjuring up of the dead, magic, for divination
 
Do you believe that some have experienced heaven or hell while still alive
Perhaps seeing their loved ones while there?
Some here have experienced that including me
So, seeing a person that has passed away in a dream as a warning or comfort at a crucial point in ones life is can also happen
It happened to me after a major injury and Marilyn Agee reports that too
That is not necromancy
 
So for you to totally disregard Perry Stones ministry because of that is not right. The few things I have seen by Perry have been excellent