Yeah, good match.
I'm interested in hearing what others have to say about cache - apothecary. Also in the last game I opened watchtower potion, but never really got good use of the watchtower, so out probably wasn't a good idea.
about game 3 - Given the fact that you (both) invest heavily in apothecaries, I'd say Cache is a logical and good supplement. Not entirely sure apothecary is the right way to go here though. I see possible 3 plans:
A) apothecaries and cache (haven/potion)
B) silk roads and estates (silver/silver, cache very welcome here too)
C) minions and cities/saboteur (silver/haven or silver/silver)
In A vs B, A can't really get too many green cards or the apothecaries will stall too much. So B gets a lot of the silk roads & estates. A can't compete with this amount of points, and B wins.
In B vs C, B will be a toy of player C. C can probably take the cities to level 2 fast (get 1-2 silk roads too to scare B) and maybe even keep them at level 3 for a while.
In A vs C, C can't really get the cities up because A can get cities too easily as well, and A just buys provinces faster.
This just sounds way too complex. Am I dreaming here? Is either one of these plans superior no matter what?
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In the apothecary game, you need some cards that take care of the non-coppers on your deck. That's why I'd open haven/potion here if I go for this plan, and also prefer haven over silver later on. Apothecary decks without buys tend to have either not enough or a huge amount of money, and haven also helps out there.
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In game 5, I think you got the best opening with watchtower/potion. I fact, I would have bought another watchtower on t3 (not so sure about this). But t4 I'm pretty sure you make a mistake. A university on your deck is nice, but what you really need now is familiars. You can't get it on your deck, but you can get it in your deck by playing the watchtower (+2 money, no reshuffle). The university is long term itself, and the actions it gets in this game (mainly drawing) are also long term. Leaving the two coppers on your deck is annoying in the short term. No time for all that now, first take care of the curse split.