First job - clear convoys, second job - prepare D-DAY force.
Other options as time and resources permit, not neccessarily in this order:
Invade N. Africa and threaten Italy, or head right for ME.
Invade Norway and try to get troops to Moscow before the Germans.
Send air units to Moscow whenever possible.
The problem with trying to SBR Germany is that they can afford to keep fighters in Germany, and they can replace fighters if neccessary. That means bye-bye to your expensive bombers in short order. UK cannot afford to replace their airforce until late in the game, probably too late. If US wastes too much money on bombers, they don’t clear the convoys and they don’t put any real pressure on Germany. That is a sure way to lose as the allies, IMHO. 2 fighters and an AA gun can hold off, most likely destroy, any but the largest of bombing raids, ie. 5-6 bombers, or more. That is way too much money blown on the wrong war materials. 6 bombers cost 90 IPCs, which could buy a lot of transports and passengers…