You get Sheen on Poppy. Like, 99.always% of the time. With Frozen Fist now here, it's a way to keep enemies slowed (along with people who may be peeling for the APC / ADC you're focusing) and gives some hefty armor with a bit of CDR. Trinity gives more 'sheen' damage, with phage + zeal (AD / HP / MS / AS), but no armor and a weaker, single target slow that doesn't always proc. Which of these is better on Poppy? When would you get either? This is for AD Poppy of course, Lich Bane for AP seems a lot smarter.