[Xadion]

yes in our current timeline it has effect in main hand only. BoH is discarded because of this as its click is nice to have when epic works in offhand but is not worth the time swapping for the click...but you can, its not like as a bard you are doing anything else!

bard epic is a necessity forever in our timeline, as yes: it mods voice/singing songs...something no instrument can do.

epic + lyrans mystical lute in offhand is the BIS for bards currently or if not doing string the PharaDar katana in offhand