...if it converted the HP into the stat complimenting the gold item, giving 
no HP as a stat but more AP and mana regen and 
would get mana regen and CDR instead of HP
This is probably why we see 
much more then we see the others, because the entire thing is made out of a stat those supports desire
Aeolian Melodies2 votesI'd be more inclined to buy the Eyes if they did not have shitty stats on top of sacrificing the powerful active of Talisman or FQC. Like, if they had left the 150% mana regen untouched on the blue Eye while nerfing the mana regen on FQC, maybe I would have been inclined to get it on someone mana hungry like Sona, if I was not going for Crucible that game and wanted just one item to fix my mana. But why would I be sacrificing stats + a great active when comparing to 
+ 
?
They're also an odd concept in my opinion because their main appeal is slot efficiency, since it combines your mandatory income item with your mandatory Sightstone, essentially giving you an extra item slot - on the class that does not end with a full build most of the time, that is, and typically thrives on GOLD efficiency as opposed to SLOT efficiency. I feel like they're a better fit for non-supports going support and wanting more gold and room to build what they would buy normally (but even that falls flat since most of these champions are mages, and FQC is quite powerful).
has its use since the active on FotM is actually not that amazing, stats are actually decent on this one (but I don't buy it since I don't play supports who use 
's line);
has completely crap stats, and you lose the frosty ghosts active that is going to be infinitely more useful than one extra slot in virtually every situation;
errr... imo it's the worst, because the ONE reason to go 
over 
or is that you want the active on 
... the line itself provides less than the 2 others (less gold unless you can't use the 2 others, no combat stats whatsoever, less mana regen in and 
vs and 
)so why and when in the actual fuck do I want to take my shitty , upgrade it into a shitty , then instead of getting the active which clearly is the main appeal of this line, getting this item?
Onegarion1 voteswe see because the execute proc is still really good. gives 6 extra gold and 10 hp which is crap and has the same gold on ability hit and the power of is beyond what eye of the watchers can give. Its not that is that great, but that the passive of the others is crap compared to their actives.
Paladin 0f Life1 votesWell equinox has extra health too
Onegarion1 votesit does, but that has 0 to do with its strength
RedCyclone1 votesbut it's also not a downside and is complimentary
Erockandroll1 votesThe main appeal to the eye items is the slot efficiency. That comes from combining your sightstone with gold gen. Leaving your more slots open, and the fact that you can combined that item early, means you can rush for secondary items earlier.
So the main reason not to take an eye item is if that the alternative is invaluable, or there is simply no good item to rush. That wouldn't be the case because I think the multi man shield from rushing locket, is better than the shield offered by FoTM. (and the legion passive is pretty good to) I've seen people take Eye of the Oasis over talisman, it actually offers better stats than talisman. but FQC is the odd one, as I can find a dozen uses for the spooky ghosts.
Paladin 0f Life1 votesFrost queen op. Talisman great for engages. Face Sheila falls off. Only eye worth getting is equinox