I was thrown wb lead when the previous one quit the game. it's been pretty successful so far as we have pretty active players.
for the 8pm scheduled raids I arrange. if anyone did not make it I leave it up to them to arrange their own
fix a time for normal defence. try to get as many people on for this as it's a guaranteed legendary item. I do this at 8pm Thursday before wb raids
people generally dislike doing purge the depths. some enjoy endless defence but some find it a waste of time or don't want to do it regularly. don't make these compulsory or pressure ur members to do it as there are already enough daily tasks
kick members who are inactive for a period of time. for me we only had one such member who we could not contact. I kicked him after 10 days.