Originally posted by Science Dog:

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For other bases in more hostile places, like the plains biome, I get cheesy and dig a deep moat with stone walls inside the moat. Keeps me from being attacked by spear-wielding fulings and they can’t melee the walls down either.

Yeah, just tested my "new and improved" arena/redoubt with inner stone walls... fulings made a mess of things, but had I been protecting a base it would've worked ok. Only the berserkers madeit past the log beams, the others merrily wrecked the X crosspieces - but at that point in the game, who care's about trolls? lol

[edit] Arena/Redoubt Mk III kiting destination: https://steamcommunity.com/sharedfiles/filedetails/?id=2855314964

Looks pretty much the same after fulings except minus most of the X pieces.

[edit 2]: and the central tower platform took a pounding.