Suggested rework of Phage/Triforce
I'm not saying that I don't like the rework to phage to increase movement speed upon hit, but if you guys (Riot Games) want to make it an item that slows then here is what I suggest. Make it have a soft stacking slow, similar to that Gankplank's passive. On phage it could be a slow that stacks 3 times and each hit gives a debuff of 10% MS. On Triforce this could effect would be the same as I listed above.
If you(Riot Games) make this change you can then rework it back into Frozen Mallet. At this point instead of having slows that stack 3 times, it would just be 1 hit that gives the 40% slow (melee) or 30% slow (ranged) on the item. Basically Frozen Mallet retains its Icy passive, but you're giving more options for people who want to build phage.