i was using my mobius, which uses polaron weapons. i did a couple missions using the borg set. no math formulas or data logs used.
i then switched to the full jem’hadar set and did the same exact missions. i blew up a lot. my ability to destroy ships appeared to be no better or worse.
replaced the JH shield with maco 12 shield. did better, but not as well with the straight borg set.
my unscientific conclusion: put your jem’hadar set in your inventory and hope someday an upgrade becomes avaialbe for it. i really like that purple color. just too bad it is not a better set.
i find the concept of the borg to be scary; to be assimilated and just be one of the collective. however in game, i don’t think you can beat the borg set. just my humble opinion