TGEA and Far Cry 2 - style terrain

I've been playing Far Cry 2 and, between running away from brush fires, noticed that the terrain consists of large outcrops (sometimes entire hills) and boulders embedded in a ground mesh.

How would you recommend i approach something like this in TGEA? My guess is Atlas 2 or legacy .ter for the ground and DTS for the rock formations, but an informed opinion would be helpful.

I suspect this is probably answered somewhere already.. if so, please point me to it.

thanks!