We've just played and finished with a success on our first try. We played with Gloria and Harvey. We can attribute our victory to:
1. Getting the dragon's eye and stopping a couple of mythos cards
2. Gloria getting the .45 and Wither (through an encounter), the Lore skill and mists of ry'leh
3. Carefully monitoring the monster level/terror level to keep it at 0
4. Harvey getting the Voice of Ra spell
On completion we had 2 gates open. Made a nice change not to have to close them.
I guess we could have farmed it for a few more rounds as the doom track was at 8 and got some more monster trophies, but you never know what can happen so we thought it best to quit while we were ahead.
Who says the young ones have all the fun?