Sounds daft but I usually use whatever the dart comes with, or if they are pro player darts I will use the same set up as the pro.
I am guessing, particularly the player darts have been precision tested to fly best with the players own preference of stems and flights, that's my theory and works well for me as it stops me tinkering, something I used to do to disaterous effect (just look at Barney if you want to see how over tinkering can affect you
).
Think Chizzy uses short nylons with standard flights so may be worth trying that setup first and adjusting from there.