How about more of a 51/49% Japan First?
Very loose outline.
POD Churchill doesn't send troops from North Africa to Greece. Operation Compass continues. O'Connor is in Tripoli by July 1941. German paratroopers are used in a last ditch attempt to cut off the British supply lines. The remaining Axis troops attempt to retreat into Tunisia. The French are not amused and the Mareth Line becomes the anvil to O'Connor's hammer.
Greece falls a little faster. British reinforce Crete by moving in troops from East Africa as that campaign winds down. The island holds, mainly due to the German paratroop corp being depleted in Tripoli.
Results prior to Dec, 7 1941.
North Africa in Allied hands.
Algeria and most French colonies join the Free French.
French Fleet in North Africa largely joins Allies, refits in US ports as needed.
Mediterranean route is opened partially. Allied shipping hugs the coast and runs past Cape Bon at night.
Large air war contesting area between Tunisia and Sicily
Pantelleria becomes the Italian equivalent of Malta
No costly Malta supply runs.
Ark Royal not sunk.
British begin planning invasion of Sardinia and Corsica
Singapore and Burma reinforced with troops not required in North Africa
Results after Dec, 7 1941
RN Carriers quickly sent to Indian Ocean if not already present.
Singapore and much of Malay Peninsula and Burma held.
Bloody draw naval battle fought between RN and IJN near Timor
Timor reinforced and held
Wasp sent to Pacific earlier
Ranger sent to Ferry aircraft to Australia instead of Africa
So in Spring 1942 America wants to knock Japan out of the fight first. Churchill likes the soft underbelly / Balkans ideas even more than OTL.
Allied Plan Pacific
Send some US Divisions to Burma that OTL were used for Torch
Island hop through DEI.
Allied plan Europe
British / US Invasion of Sardinia/Corsica in Fall 1942
Invade Sicily in early 1943 with significant participation of Free French troops equipped with US made gear.
Develop Bomber bases in Crete and Sardinia
Invade Greece or Italy after US lands troops in Philippines and Japanese fleet pushed back to home waters.
UK may decide to do Balkans campaign without US or Italy may seek a separate peace in late 1943.