It's impossible to build a team well equipped to take down every team in the NHL. It's the rock-paper-scissors effect. If most of the league is building scissors, you build yourself a rock of a franchise. You win every time against those scissor teams. But suddenly, you run into a paper squad in the playoffs and they kick your ass.
Case in point: I believe the Ottawa Senators would have won the Cup in 2007 had Detroit beaten out Anaheim in the Western Final. The Sens just matched up better against the Wings. The Ducks had the horses to grind the Senators down with hard, physical play.
This year the Senators have to be careful not to get too focused on constructing a club to beat a rugged team like Anaheim. For starters, the Ducks might not even get to the final. There's too much talent in the West to suggest it's a fait accompli. For example, if the Sens give up speed and finesse to acquire hard nosed veterans, they might find themselves less equipped to deal with a quicker Eastern team like Pittsburgh.
I think all you can do between now and the deadline is make sure you're as prepared as possible for the Eastern teams. Last year's formula worked perfectly and there hasn't been dramatic change this year. Focus on winning the conference then hope the luck of the draw falls your way in the final this year. (And that you don't have nine days off before it starts).
Having said that, 2 players on the opposing side tonight should prove very attractive to contenders between now and Tuesday. Mike Peca and Adam Foote both become unrestricted free agents this summer. Tell me they wouldn't look good in Sens' uniforms. Guys like that beat rock, paper and scissors.