I've seen at least 8 SGs on a server reset back in the day. I was rounding them up to quad 4 of them on my druid. If someone is killing Sgs with any regularity though it was rare to see more than 3-4 at any given time. Usually there are only 1-2 up But if you start killing all the pathing, non croc trash mobs in oasis and don''t kill any SGs that spawn and I'm sure you can get even higher than 8.