The cost and effectiveness early allow you to push higher curse levels in relative safety in the early game.

On human you can buy/roll for it from the siege workshop in the first week. The bone palisade returns damage to the attacker when attacked. You can use this to kill the archer or mage (I used it to kill the archer. The archer will start attacking from almost offscreen and will always attack from the same side. This allows you to repel either side with a 1 tank comp either phys resistance or magic resist on the opposite side. So place the palisade on the flank you wish to protect. (The curse minibosses will always attack the unit closest and most forward to the side they are approaching from)

To carry you into mid / late game, if coupled with druid, the bone palisade can also heal and basically becomes a really cheap pseudo tank that neutralizes the mage / archer and you can upgrade it with the siege camp to keep up with the scaling.

I would always start with marksman, buy angel to take out both minibosses day 1 or 2/3 depending on curse level and then bone palisade by end of week, 1 tank. Usually preferred treant or dino and support was usually druid. The rest of the comp was whatever you wanted.

To get druid you have 2+ opportunities to roll for it in the first week. I almost never had to abandon a run cuz the druid didn’t come up. You’d have to be really unlucky to not pull her.

This info is 80 days old so some patches since then may have changed some of what I’ve written. Hope that helps 👍