do all the skills, flicks, roulettes you want mate, if you do them in a designated order every time it's a bit easy to work out.
I find 'skillers' extremely easy to deal with since most are awful and do the same skills over and over like you said. But once in a while you do come across someone who pulls them off very smoothly and it can be trouble.
They've been going quite cheap the last couple of days, although that's mainly been due to the server going down or the web app not working. A few of the contracts I was selling went dirt cheap (they usually go from anywhere between 650 and 900 coins).