Wiggle your way up the awkward diagonal gap between the fallen blocks. Do not ascend the chimney but traverse immediately right across edge of the roof to the middle of the face. Move up the face to a small ledge, then trend right to multi-trunked tree. Follow the hand crack above the tree to the top.
The right side of the large fallen blocks that are left of the large overhanging roof. Same start as Nikemares and Special Forces.
Careful, there's no protection until you reach the ledge.
BETA PHOTO: Top of Air-to-Ground (white).