Useless Runes
Browsing through the rune page, some of them are painfully obviously useless. But there is another set that is entirely useless without necessarily appearing as much.
% health seals.
Mathematically speaking, if you managed 5k health, these become efficient (.005*5000 = 25), which is almost the same as the scaling hp runes (24 at 18), that doesn't require your champion to stack health.
Is this supposed to be a trap for stupid people?