So in this version of Sealion, you attack London in two stages.
Build: 4 transports
Do not attack USSR.
Attack Paris with every land unit you can EXCEPT 3 inf and 1 art from Belgium: these 3 inf and 1 art are to attack Normandy.
Attack all the British ships except the British cruiser in SZ 91. Spare the German battleship. Keep it and the cruiser in SZ 113. Attack the Canadian des and trn with 2 subs.
Land all the planes in Belgium, except for a couple of fighters, which you land in Western Germany.
Move 2 art from Greater Southern Germany to Western Germany. Move 11 inf and 3 art from Berlin to Western Germany.
Place the 4 trn in SZ 113.
UK will probably buy 9 inf.
If UK blocks the German fleet by moving the cruiser from SZ 91 to SZ 110 or 112, attack it with the Italian planes.
Buy 1 aircraft carrier and 2 trn and 2 bombers.
Still do not attack Russia.
Attack London with 5 inf and 5 art from the 5 trn from SZ 113, along with all your planes. Now you probably will not win this battle, but here is the key thing: you will probably take out 9 or 10 units from 1 round of rolling, and lose all 10 land units you brought in. After that, retreat all the planes back to Belgium. If UK chooses to lose AA guns that will help you in G3.
Non-combat hopefully 7 tanks (if it least 4 took Paris) to Western Germany, along with 7 inf.
Place the AC and 2 trn in SZ 110, which is where the rest of your fleet is. You can build them here because you took Normandy on G1, which has a minor factory. Land 2 fighters on the aircraft carrier. Place the 2 bombers in Western Germany.
If UK attacks the German fleet in ZS 110 with their planes, they probably will nott win, and they will lose more defense of London.
UK will probably build 9 inf again.
Build all inf to fend off Russia.
Attack London again, with the 7 inf and 7 tanks from the trn, and all the planes including the 2 newly built bombers. Chances are you should win. If UK lost AA guns in the first attack, there will be less AA firing at your planes.
In this method, you spare the 6 inf from Greater Southern Germany to use against USSR and you have 2 extra bombers also to use against USSR.
I call this two-stage Sealion advance notice please because you give advance notice of your attack by building 4 transports at the start AND on Chinese food menus, it says “advance notice please” if you ask for two-stage Peking duck.