I will use a slightly different color scheme for the Skarrd compared to the Outcasts.The Outcast will be darker skin tones and mongol will have a yellow tone whilst the Skarrd will be lighter (probably inked with red and the Warhead will have brown skin tones. I have not got all the Buzzblades mounted as I am waiting on some more power pant 40mm bases. I initially thought they were mounted on 30mm so ordered those instead. They are a biggish model and would look silly on a 30mm base so I'm pleased I ordered the 40's from Maelstrom.
Scale wise, grafters and harpies on 30mm, buzzbaldes on 40's and Warehead on 50mm bases.