Haven't watched Duclair in some time but if the Sens are going to have to add something significant to this, I'd go for more of a bottom-6 oriented player as opposed to Duclair. Sens have enough guys who are offensively oriented and not enough shut-down 3rd liner types which I feel like we are desperately missing.
Tkachuk-Stutzle-Tarasenko
Giroux-Norris-Batherson
Kubalik-Pinto-xxx
If we can flip Joseph for an affordable defensive-oriented, hard forechecking 3rd line RW with control i would be very inclined to flip Joseph + one of our 1sts. Duclair doesn't fit the bill for me though.