Now first off, if I were faced with a slow moving enemy that could adapt to energy weapons... I, having not attended Starfleet Academy, have a really simple solution 
So as its established the borg can adapt to energy weapons via ship shielding and personal shielding sorounding the drone.
In First Contact Picard Establishes the obvious that the borg cannot survive without their organic components, and a further illustration of this point is the holodeck scene where he unloads his tommy gun on two borg killing them...
So basically, its very likely that not only could Starfleet personal easily defeat borg with projectile weapons and melee weapons such as I don't know SWORDS or a knife... but its also possible they'd be able to use high explosive conventional weapons against borg ships, such as Nuclear Weapons and missiles.
Of course such weapons would have to be modified to deliver a decent amount of firepower, since current versions in our time would not be adequate at all.
Jeez, this is why I should be in charge of Starfleet

So as its established the borg can adapt to energy weapons via ship shielding and personal shielding sorounding the drone.
In First Contact Picard Establishes the obvious that the borg cannot survive without their organic components, and a further illustration of this point is the holodeck scene where he unloads his tommy gun on two borg killing them...
So basically, its very likely that not only could Starfleet personal easily defeat borg with projectile weapons and melee weapons such as I don't know SWORDS or a knife... but its also possible they'd be able to use high explosive conventional weapons against borg ships, such as Nuclear Weapons and missiles.
Of course such weapons would have to be modified to deliver a decent amount of firepower, since current versions in our time would not be adequate at all.
Jeez, this is why I should be in charge of Starfleet
