Scrying Pool definitely helped. KC always helps, but I didn't necessarily need it, and certainly wouldn't have if there was any other source of +actions.
I only bought Coppersmith because I knew I'd have problems getting to $7 with just Monument and no +action, so the help on turn 10 can't be underestimated.
The game is noteworthy in my mind for two reasons. First of all, pure Copper strategies are fun, especially in Colony games. Secondly, there was a ton of potential here, which is masked by the lack of +buy. I generated $34 on turn 17 in a game where I couldn't use it. If I had ample +buy, there was serious mega-turn opportunity, since I could have loaded up on KC, Coppersmith, and whatever else.