I just calculated the chance that you hit $5 at least once on turns 3-4 with Salvager/Lighthouse vs. Salvager-Silver [assuming that you don't Salvage the Silver/Lighthouse]. Salvager-Lighthouse is about 67%. By comparison, Salvager-Silver is about 83.5% (Salvager can miss estate, so it is not as good as the standard double Silver chance of 91.2%: http://dominionstrategy.com/2011/06/21/opening-probabilities-part-ii/).
If you Salvage the Lighthouse/Silver to get to $5, if need be, as Davio pointed out I should consider, then the chance to hit $5 at least once on turns 3-4 increases for Lighthouse-Salvager. Lighthouse-Salvager increases to about 75.5%. Silver-Salvager is unchanged at 83.5%.
The reason why Salvager-Silver opening is unchanged is that Salvaging the Silver can never cause a hand that wouldn't otherwise hit $5 to hit $5. But Lighthouse-Salvager-3 Copper hits $5 if you Salvage the Lighthouse, which makes a difference.
In general you buy too much treasures that could be used more effectively in midgame
Thanks, good points.
