I was testing the new frenzy merc in PTR on an offline character and attempting to give the Merc dual flamebellow balrog blades (which I believe should be dual-wieldable by a barb.) Seems like an interesting merc option to try with flickering flame and dual flamebellows for level 35 inferno and minus to fire res.
I was not able to give this sword to the merc and needed to go back to one of the two-handed sword merc variants instead. With the stock two-handed sword merc, he could use it (and does use Inferno as part of his repertoire.)
Is it expected that the new dual-wielding frenzy merc is not able to dual wield balrogs?