A serious G1 Sealion build at the LEAST should include a carrier (with 2 fighters to be landed on it) and either 2 trans or a sub and destroyer. There’s no way your cruiser and bs are going to survive whatever is left of the Royal Navy and RAF UK1.
There are at least two options for Sealion:
1. Destroy pretty much the entire British/French fleet around Britain with the Luftwaffe G1 and use the starting subs for soak hits. Force Britain to build ground units in response to your transport build(s) G1 and/or G2. It will be a straight-up dice slug-fest match for England with the UK having the advantage in ground units but surviving German air deciding the battle outcome.
PROS: If you roll well you have a decent shot at winning the game early.
CONS: If you roll badly you’ve just wasted 2 turns of IPCs that could have been prepping for Russia. Might still be able to maintain control of Atlantic for at least a little while with the carrier and bs however.
2. Destroy the RAF G1 by pummeling England with 3 fig 3 tac and 1 bomber against Britain’s 2 inf 3 fig and the AA hits. Should have at least 2 fighters survive, the subs plus fighter from Norway kills about 1/2 the starting British fleet. Britain is forced to split IPCs between land and naval units. If the remaining fleet isn’t reinforced G2 you can kill it at leisure and build more transports for the invasion. If the UK just builds a bunch of naval units build more subs and air for a KO blow while building enough transports to take out a UK2 all land unit build. If you’re feeling really plucky G2 and you built 2 transports G1 instead of a sub and dd you can invade Scotland with 3 loaded transports and throw the UK into a scare. Hell, if Britain just turtles with naval units in the Channel just drop your transport stack off in Scotland anyway.
IT CAN BE DONE!!!
PROS: Knocking out the 3 starting fighters in the UK drastically reduces the UK’s chances for survival against a determined Sealion attempt.
CONS: You’re throwing away 75%+ of your airforce round 1 to increase your odds of a successful Sealion.
Ye gods, I really really want to try these strats out.