If player A starts onSlaught and other members joined, will all troops arrive at the same time as Player A, or different troops arrive at their own time?
The question , may have been asked and answered before here on the forum,I unfortunately do not know the answer but if no one else responds, its the sort of thing that you could test with yourself and clan members on targets where it will not matter if you mess up, in fact it would be good practice for the real thing.
Always easiest if some knows and posts the answer.
However testing this,ought to be quick, it would only take swapping a player once for another where you knew their speed time and check how the onslaught time changed, if at all.
Once the troops have reached the os initiators town and the os is sent ,the os can only move as fast as the slowest troop type/participant that is partaking,