Interesting situation here. On the worst end you would be trading Barkov + Bjugstad for Daniel Sprong + 5th Overall? That would be pretty bad. 21-31% chance seems pretty risky and a lot of value to be putting on risk for the 1st overall pick. But there does seem to be a considerable gap between Auston Matthews and 2,3,4,5.
Personally I would try and keep Barkov and Bjugstad because wouldn't their salaries be cheaper?