I don't think this is an important game unfortunately. Even if we somehow get a decent result in the first leg, if Juventus desires (they always do against us, perhaps to kick us while we stay down), they can still turn it around. In a way, we will be wasting at least 180 minutes for not much gain.
I think we should still focus on the league. I know the chance is very slim, but it is not all dead. Our depth and quality of squad simply doesn't allow me to run on both fronts. Plus, if we wish to use this route to get to EL, I am sure that we can have that achieved by getting into the top 6 (or top 7), which is significantly easier and more realistic than top 4.
The benefits are limited. If we win the whole thing (unlikely), we have one more trophy; if we win the first leg of SF, it would be a good morale booster as we need that to bounce back quickly. Other than that, not much.
When is the game by the way?