I saw this recipe here on the Realm a while back and really liked the way it looked.

ML X-23 from the waist down and for the arms.
Torse and head were DC Hush Huntress

Dremeled the waist line of both figures to get them to fit together, then added some sculpt to fill in the gaps.

Painted with chaos black, custom mixed grey, and custom mixed metallic shade (which didn't really come through in the pics.)