Talk:Thornmail/@comment-92.29.123.148-20120305151659/@comment-69.141.8.150-20120422043720

"I always go for this on Rammus, it adds 100 armour, in turn giving bonus attack damage, and gives pretty much a passive defensive ball curl. I just rush groups of 2 or 3 with this and they soon turn and run. Frozen heart gives pretty much the same armour but it slows enemy attack speed, and you WANT them to hit you to reflect a % of the damage"

While the passive does synergize with rammus's taunt, that's about the only time it'll get used. Meanwhile, a Frozen heart will lower enemy carry DPS no matter who they target, it'll lower *all* enemy auto attack dps for that matter. This is in addition to the large mana and CDR bonus it grants, both excellent for tanks.