Where did you get that 28% ABV nonsense?
Let me me you in on a little bartender secret; the Long Island Iced Tea is just a horrible cocktail. No one who knows anything about drinking orders them, and I'll tell you exactly why.
You remember when you were about 9 years old and you and your friends would ride your bikes to the 7-11 and get a Big Gulp cup and just run it down the line mixing every soda into a 'suicide'? Of course you do - we all did it. Well, the Long Island Iced tea is the same concept. It's all the clear liquors mixed together with no regard to complimentary flavors, and then covered in sour mix with a dash of Coke.
And every single Long Island Iced tea that I ever made as a bartender, or ever watched another bartender make. was made with rail brand liquors. The house brand, plastic bottle stuff; Aristocrat vodka, Montezuma Tequila, Barton gin Ronrico Rum. Pure crap.
And I tell this to everyone when I'm talking about LIIT's - but it's so true - if you ever get the chance, pour yourself 2 shot glasses, 1 of cheap gin and the other of cheap tequila. Smell them, side by side. Taste them. Now imagine those flavors mixing. They have no business being in the same room, much less the same drink.
And the rest is cheap bar sour mix, artificially flavored, powdered citric acid and high fructose corn syrup.
Oh, but they're so strong! Are they really? Simple physics says you can only fit so much fluid into a glass. There's a lot of ice. You need some sour mix to cover up all those cheap booze flavors, and some more space for some Coke - by the time you're done, you're just looking at /maybe/ a double shot of actual liquor.
A decent sized martini is every bit as strong.