On green side bunkers I’ve been a proponent of getting the arms and club back so that you always have enough swing to get thru all kinds of sand, soft to heavy. Next opening and closing versatility on a 56 degree of loft 15 degree angle of bounce is magic. 56 degree loft is all the loft you ever need, especially when you add some more.
The final piece is learn to change angles of approach on the up and downswing, some deeper lies like semi buried need steeper angles and neutral lies more on top of sand shallower sweepier angles. Golf is a game of angles, differing degrees of angles needed at times especially in green side bunkers.