hm, dips can or canot be, simply another form of bench press, to the shoulder etc its all the same.
everyones strcuture is different slightly, i learned some are type1,2or3 ac joint, this alone changes things mechanicaly.
there is no one size fits all exercise.
bigmc said 1 thing never lift more than you can do on your own for 10reps.this will make you last the longest, as long thats painfree, i think this is important addition.