For my next run im going to try out the 5-1-1 mix.
The 5:1:1 mix:
5 parts pine bark fines, dust - 3/8 (size is important)
1 part sphagnum peat (not reed or sedge peat)
1 parts perlite (coarse, if you can get it)
garden lime (or gypsum in some cases)
This mix is intended for annual and vegetable crops in containers. This soil is formulated with a focus on plentiful aeration, which has an inverse relationship w/ water retention. It takes advantage of particles, the size of which are at or just under the size that would guarantee the soil retains no perched water.