User blog comment:Zilla4444/The Sheen/Trinty Force Dilemma/@comment-71.136.48.108-20120627020414/@comment-5009341-20120627071339

sheen has a passive which is great for ad champs but the stats this item provides are ap oriented,

while lichbane is a pure ap upgrade, trinity is only (more or less) hybrid upgrade, due to the stats from sheen (which are ap),

so that u would waste money if u would get trinity on many ad champs, which actually would benefit from the passive damage proc a lot (ashe, vayne, olaf...)

while def stats are usable on every champ, (i actually wanted it to be build from ad, as or crit items, but all three were already used in TF)