I'm sure this has been mentioned before, but this is quite the potent combo. Storerooms combines the ability to sift through a large number of cards as well as convert cards in hand to virtual coin. As a double Tactician enabler the only thing you need is a Village and +$2 generating action. Once set up it is almost impossible to misfire. You can overbuy Storeroom with almost no consequence to you deck quality.
In
this first game, the double Tactician starts firing on Turn 9 (actually 10 but a Turn 9 misclick resulted in buying another Storeroom rather than starting the combo). It makes use of Border Village/Mountebank as a Village/+$2. Additionally, when Forager becomes +$2 it is possible to start trashing Copper and steal get up to $8 with a card left to discard to the second Tactician.
The
second game really illustrates just how powerful this can be. How many engines do you see after Sea Hag battle? This one makes use of Conspirator, Pearl Diver and Warehouse for the double Tactician/Storeroom support. I actually misplay this one quite badly. I believe that I could have build up to a better more reliable engine. The Caravan should have been a Conspirator. I get the double Tactician Storeroom part going and I stop with only a single Conspirator in my deck. The fact that my opponent was up 3 - 1 on Provinces made me wary to build up. But I think if instead of my first 2 Provinces I had picked up 4 Conspirators, I would have been in a better position in the endgame. As it was, I was able to sneak out with a 1-point victory due to a penultimate turn Duchy/2x Estate.
What these illustrate is that first, this combo can be fast and consistent. Without much hindering, it obtained 7 Provinces in 16 turns. Additionally, this combo is resilient. It manages to maintain double Tactician with good reliability after an initial Sea Hag slog with no trashing.