Point stands that your claim of making a character with three 20s at level 4 off a three 18 roll set is false. There is no 'easy' way to do that, and I'm not certain there is Any way to do that legally.
Again, I'll ask a second time: Please enlighten me how you're getting that.
Well, assume you roll 3 18s. Now take Half-elf. But +2 in CHA (+18 = 20 on level 1) put you free ASIs in CON and DEX or STR (2 19s at level 1). With you ASI at level 4 put 1 point in the other 19 stats. There you have a very very powerful level 4 Paladin/Bard/Sorcerer/Warlock.
You see it is not hard, and doable with everything we have in the game right now. If they implement Tashas rules you can make the +2 ASI also whatever you want and can have any 3 abilities at 20 at level 4.
