Zz'Rot's Portal and Zeke's Convergence are pretty weak items

Zz'Rot portals die way too soon. Now that they no longer gain health per level minions kill them easily. Each one only has 40 health and around 100 armor meaning they die instantly if they meet a minion wave. I got Mundo to 5.7k health and bought Zz'Rot to see how effective it could be. The small ones did nothing while the huge one could only got two minions before dying.

The biggest nerf to Zz'Rot was to their lifespan though. Now you can only use Zz'Rot about 2200 units away from a tower before they die out. An example of this is mid tower to the next mid tower (by the time they get to the enemy mid tower they're already on 1 health). This makes it really easy for enemy champions to go and destroy the portal and makes the purpose of the item (pushing a wave you're not in) really lackluster. Buff Zz'Rot please. Zz'Rot was annoying when it was good but it wasn't broken.

Zeke's Convergence is more of a situational late-game item. The 50% bonus magic damage only applies to an attacks AD portion so champions like Corki and Mordekaiser ghosts don't make much of it. Buying it early though is really bad so don't buy it early. On every Zeke's Convergence I've used and seen the results just aren't good enough. By the near end of the game the item has only racked up an additional 500-1500 damage which is really bad... Ardent Censer in contrast gets around 7000-15000 if you buy the item early (and depending on game length). Ardent Censer is health drain so the healing is the same as the damage as well.

The frost storm on Zeke's Convergence is pretty weakl. 40 magic damage per second is pretty bad, it's like old sunfire cape. The ignition is also conditional, you gotta be focusing the same target as your partner otherwise no burn and no enhanced slow.

Maybe other peoples have gotten seen better results with Zeke's Convergence and I'd be interested in reading about them tho. For now I see these two items as pretty weak.