i have just began re-incorporating deadlifts back into my rutien after a very severe deadlifting lowerback/obliques injury . the reason for the injury was more a matter of overtraining on the exercise , going to heavy to fast , & overtraining from my job at the time where i use to build wrestling mats for universities/high schools etc. , it was there that i originally hurt my back so i should have known like i do now to be extra carefull of it .
but back to the question i highly recommend deadlifts in ALL forms , regular , sumo. , & stiff leg versions . all have a purpose in a balanced rutien . just remember your belt and to pyramid , and NEVER go up in lbs to fast while at the same time over training or you might get hurt .