Something people forget when talking about Hexdrinker and Seekers:
Unlike AD assassins, AP champs need mana and they need cdr more than AD assassins so building Seekers hurts their build path a lot more than just a bit less AD and no lethality early from Hexdrinker.
And Hexdrinker is a better item anyway even if mages didnt need mana because Seekers needs to stack like 2-3+ waves before even reaching 100% cost efficiency, Hexdrinker already has over 100% when you buy it, **without **the HP from its passive.
Sure mages are still dominating mid for other reasons, but that doesnt really change the fact that Hexdrinker is.. kind of busted for a cheap component item. Melee AP assassins arent played at all either (except Kassadino because tanky anti-mage assassin and stuff), Talon and Zed are at least played a bit with the lethality changes.
because mana is the only thing holding you back "
and maybe the meh
passive.