Talk:Gangplank/@comment-20434720-20140621201211/@comment-20434720-20140621221325

Item slows that are not actives do not stack. Champion slows do stack, with diminished effect. So Gangplank's passive and one passive item slow would both take effect, and if the passive item slow is larger, it will be gangplank's passive that will have a reduced effect. If Gangplank has multiple passive-slowing items, like IBG and FM, the one with a harder slow will take effect and the other will not have any effect until the first one's effect wears off (if it lasts that long).

After testing, I found that neither the Q nor the passive will proc Liandry's Torment. Bit of a shame, really.

And while each individual cannon ball doesn't do too much for damage without AP, about 4 of them drop per second. So some poor Cho'Gath would get hit for 660 damage each second. I'd call it respectable damage, although as you said, no Cho'Gath who happens to be Lulu ulted will just stand in the center of the barrage for 6 seconds (teamfights, maybe with enough AOE lockdown going on. Meh. He'd at least stay close for awhile).