You know ... I really hate the way NHL Numbers does this. LTIR space can't be accumulated. The way they are calculating it, I don't think that is being taken into account.
The way LTIR actually works is a dollar for dollar daily rate substitution. Dallas has been over the $69 million cap for a while so technically their cap space should be $0.
Technically, the Ritchie move pulls them out of the red, but in the next 19 days what they build up will mostly be negligible.
I think you'd be safe to say that Dallas could add up to a $3.25 million cap hit NOT prorated.
HOWEVER the bonus cushion does come into play. Bonus money should be able to be prorated. Other players have bonus money, but the only significant bonus is Nuke's at $1.2 million. He won't get it. It's impossible. He'd need to score 20 goals and 60 points in a month.
You could prorate that today to about $3.72 million or at the deadline for about $5.44 million.
Theoretically, you could add Enroth ($1.25) and Phaneuf ($7) with no issue whatsoever. Even without trading Horcoff I believe. You'd have no bonus overage for next year either.
Personally ... I'd force them to take Moen if you took Phaneuf. That'll leave you even more space.
Long story short ... I think Dallas can add about $7 to $8.7 million between right now and the deadline depending on what day the trade happened.
You could trade for both players today if Schlemko went to TOR FWIW. Phaneuf is about a week away from playing though.