Why is CDR such an unpopular tank stat? Why do so few tanks get Frozen Heart?
Looking at Champion.GG, I always see that Frozen Heart is always eschewed on tanks in favor of Randuin's Omen, Warmog's, etc. It seems like the mentality is always "if you screw up one ability, you should die", and thus FH and other similar CDR items simply get neglected.
You'd think a Sejuani who can use Permafrost more often would be a nastier contribution to a fight, and being able to use W more would be better for damage, but it seems people only care about how much damage her W does with one application. Weren't tanks supposed to be better at damage over time?
And the same goes for Leona's; they only want to inflict one Q stun, one E snare, and one ult, and then be useless each fight, rather than being able to stun someone with her Q every 4.8 seconds. What a weird mentality.
And most of all, why is that "one ability use per fight" mentality ENCOURAGED?
Couldn't those guys ditch the Randuin late-game for Frozen Heart? A Sejuani would have over 4k health by that point, and CDR would be more valuable than toughness in longer team fights. No one's gonna 100-0 you by that point.

on him sometime instead!
(or
if I have any sustain at all)
Boots and a misc item has been very good to me. FH and Locket are general dampeners for the enemy team and give me near the CDR cap for my disruption.
+
+
, and a core item on
. That's because they aren't directly getting focused in fights, and could use something that gives them some presence outside of a little bit of damage on certain targets. The CDR helps them faceroll, the mana keeps them from going oom, and the aura allows them a better team presence. Since tanks are already CC heavy, it's an irrelevant item on tanks besides
, who benefits from his passive.
main and Frozen Heart is one of my favourite items along side Tri Force and Gunblade~
I usually get it for the mana it gives me with the armor... O tyeebtwnks I play I don't really need it.
has mostly taken it's place except on champions who use the healing increase or champions who really need/want the CDR