What is the build order for drush?

6 sheep, 4 lumber camp, boar lure... 3 to berries?

Second question: Is a drush good for celts or is there better options?

I've been having fun trying to replicate the HOANG kind of style to get plenty of mangonels out to "eat the town center" as shown in a recent t90 video and it's really fun! Although it seems to have mixed results in 3v3 or 4v4 team games...