As long as were having fun with "what-if" line-ups based on small samples, here's what I'd do. Forget about which line is called 1st, 2nd or 3rd.
Gerbe-Rask-Staal
Tlusty-J.Staal-Semin
Skinner-Nash-Lindholm
Here's my reasoning:
1) When Jordan is back, they are going to want to match him up against the other teams' top lines. IMO, you can't have Skinner on that line when you do that. Tlusty and Semin can be solid defensively and that line has showed promise in the past and shown they can score in that role also.
2) Skinner-Nash-Lindholm have showed chemistry in the past and think that line would feast on lesser competition, especially with the growth in Nash's and Lindholm's games so far this year.
3) Gerbe, IMO, is the perfect complement for E. Staal. He works hard, is fast, takes a lot of shots, goes to the dirty areas, etc.. Not sold on Rask there, but he's solid on the puck, good defensively and has playmaking ability. Although his skating isn't a "hinderence", not sure he can keep up with Gerbe and Staal..which is a bit of a concern.
EDIT: Of course, as soon as guys like Rask, Nash, Boychuk, etc..come back down to earth, all this goes out the window