Two or three years ago (in South A) it was the two day games first, and then the one day games second. I thought it was dreadful. Seven one day matches in a row, not needing to field for more than 40 overs at a stretch, is not good preparation for finals cricket. All of a sudden you have to potentially field for 80, and then bat the next day with what the AFL would call a zero day break.As long as the two dayers are done first, which it was last year (but not 2 years ago) – I think it is the best way of doing it
If there are to be eight team grades I think that playing the one day games in a block in mid-season is best, giving a run of two day matches leading to the finals. Having two day games to start with means there's a chance you might play some of a two-dayer against a team, rather than none at all if (as often happens) weeks are abandoned in October.