He may have made an offer back in the day, he may not have. I have no idea what you're talking about with regards to this mystery Silfverberg, someone and a 2nd. That's never been reported.
What has been reported is that when the Sens and Ducks were talking previously, the Ducks told Murray that to move Ryan, they'd need 2 of the 3 roster players mentioned, along with a 2nd. Murray didn't feel that was something the Sens could do at the time. Frankly, I don't care if he made another offer since it was clearly not something the Ducks were willing to do. I know what the Ducks wanted and I know what the Sens offered in order to get the deal done which the Ducks found acceptable. And both of those deals had fairly similar components, the Sens just found a way to avoid giving up 2 of their young roster players by upping the future assets (prospect and higher pick).
I feel like I'm talking to a wall. Did the Sens want Alfie, McArthur, Clarkson and Ryan at different times? Yes. Did they think they'd be able have all of them on the roster realistically? No. McArthur was the Plan B once they knew that Alfie was for sure leaving. Ryan was acquired once they knew that Clarkson wasn't going to come. I have given you multiple direct quotes as evidence. Not sure what else you need.
Here's the article from the Citizen again for your reference:
http://www.senatorsextra.com/main/senators-trade-for-bobby-ryan