Thanks, didn't realise Spritzee is that slow and that Koffing is that good of a tank lol. One either has to run timid or scarf to reach more than 12 spd in which case Psychic does:
252 SpA Spritzee Psychic vs. 0 HP / 76 SpD Eviolite Koffing: 12-16 (60 - 80%) -- guaranteed 2HKO
Possible damage amounts: (12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 16)
or do both timid and choice specs which is like:
252 SpA Choice Specs Spritzee Psychic vs. 0 HP / 76 SpD Eviolite Koffing: 18-22 (90 - 110%) -- 62.5% chance to OHKO
Possible damage amounts: (18, 18, 18, 18, 18, 18, 20, 20, 20, 20, 20, 20, 20, 20, 20, 22)
It can't even delete foo with scarfs+modest
252+ SpA Spritzee Moonblast vs. 0 HP / 36 SpD Eviolite Mienfoo: 20-26 (95.2 - 123.8%) -- 75% chance to OHKO
Possible damage amounts: (20, 20, 20, 20, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 26)
and is obviously absurd to stat with xD. Well, I guess fairies just ain't good enough. Thanks for the answer tho :D