4 card poker---NOT the "pit" game

as a kid, we used to play 4 card poker because we had a lot of players and multiple draws (!!) . many years later, we'd like to play again. does anyone know the correct (high) hand rankings , in terms of the lower the probability, the higher the rank ? would those probabilities change WITH a draw--or multi draws ? also, what is the probability of a 4 card 6 low or better , with a draw or draws ? yeah, we have some wild ones.....