So in the name of science…recorded this one a couple months back (edited to shorten and re-post) so not sure if the super still generates the same numbers, but me and a random guardian were able to generate about 77 orbs with 5 instances of the Shadowshot in a 2 minute span while on Venus patrol with Enemy moving against each other. It was fun times. I think I counted over 20 orbs each with two of my supers…likely all small orbs though.