I think for bow and wands you must also consider possible bonus damage through hightadvantage, similar to backstabbing for daggers.
This is true; some of the time you can get high ground, which is a nice 20%. It doesn't do much to change my analysis for either though, as bows are already good and for wands a 20% bonus on an unacceptably low number is still the lowest by far.
Of note, the staff ranged shot can get the high ground bonus too, but the ranged shot is only 90% of the damage of the melee portion, which is still nets a slight increase. (.9*1.2=1.08)
