The Berry Rush

Like this, except six minutes sooner:

https://www.youtube.com/watch?v=svRfcveKCHg&t=1h8m30s

Once you've found a bare minimum of sheep and boar, you send your scout to find the enemy base. As early as 11 villagers, you send around 4 villagers to your opponent while you research loom. You try to use the advantage of surprise to wall in some villagers if you can, or at least force your opponent to demolish a building to escape like MbL did. Then you use the 30 seconds you have before your opponent gets Loom to consolidate your control of their berries, with houses or palisade walls, so you can harvest them yourself.

This may force your opponent to make an extra four farms, but also saves you from having to make farms. Can follow with a dark-age militia rush, especially if you're worried about getting towered at the berries.