I am not sure if chapel/masterpiece-feodum is thing as trashing will speed-up masterpieces.
As this game its pure masterpiece/feodum, trader was mistake. Idea is to always buy silver, from 5 overpay masterpieces until silver is gone. For feodum mirror buying, here silver split is critical and trader is too slow versus five silvers per turn from silver hands, after silver gone its weird to buy feodum with 8 hands.
Chapel looks like it will help to snowball by removing initial cards to snowball faster your money density. Here I am tempted to open mining village/chapel for better second shuffle, on collision you couldn't trash silver but could ignore village and otherwise you draw extra copper
As opponent that playes village idiot bm its little wonder that he doesn't see anything.