Whole wheat pastry flour
Flax seed meal
baking powder
egg beaters
Sprite instead of milk
Sometimes add small container of oatmeal

Don't usually use any oil at all. Sometimes I might add a bit of regular or self rising flour.

Or sometimes some low fat biscuit mix.
Sometimes even a bit of oat bran or a dab of corn meal. Just whatever strikes my fancy that I have on hand.