Range of P-8 + KC-45

It is slow day and I just drifted into wondering what would be the range of One P-8 with Maximum weapon load flying with another KC-45 with full fuel load. Assumption is that both aircraft have to fly back to same base from where they took off. There is no other base for emergency recovery. I suppose there has to be Two set of crews on both aircraft and say 4tons of armament on P-8. My guess for the range would be :-

First refueling at 2000km. If there is a technical problem then mission can be cancelled and another launched.

Second at 4000km. If there is any unforseen technical problem with refueling then both aircraft can still make it back to base.

Third refueling at 6000km and then at 8000km. After refueling at 8000km P-8 can remain on station for 2 hours and then recover to base with KC-45.

Total time in air around 22-24 hours with combat range of 8000km with loiter time of 2-3 hours at the designated spot

Is it correct assumption? Will this combination outrange and (outloiter time) both Tu-142 and off course P-3??

Incidentaly does the P-8 consume less fuel per hour when it is loitering at slow speed compared to its cruise speed?