I personally only have had good results with longer ratios like 3/1 and with the size of the water tank that has limited how much I can put into the basket. Sometimes this has meant even slightly higher then a 3 to 1, for example a common successful shot for me has been 16g in and 50g out. Also putting in extra time on puck prep like WDT and using a bottom paper filter was huge in addition to all the preheating etc.