Sign a striker who would guarantee you 25 goals next season or a keeper who didn't make a single mistake (ie only let in unsavable shots)?
The keeper as we have other players who can and should chip in with goals during the game but you only get one keeper.
Keeper. No matter how many goals you score, you could still end up losing. A clean sheet however ensures at least 1 point.
Well as we can’t do either as no keeper is ever mistake free and no striker is guaranteed to score it’s a bit of an optimistic question. Anyway I want both but will finish up with neither