While it's true that the potency of LSD is ridiculous (normal doses being a thousandth of what other drugs usually require), the effects are not limited to LSD. Mescaline and other psychedelics produce similar improvements in cognition, and have higher dosage requirements. Mescaline, for instance, requires around 100mg for a light dose, while for LSD it's over 1000 times smaller at about 20-70ug. So if you're concerned that LSD is just too easy to fuck up, in terms of dosage, try Mescaline instead.