I think tainted debuffs could use some adjustments since it doesn't quite have the same ease of use as the buff counterparts. The pick up radius for the debuffs is a bit too small and should be increased since you have to lure enemies into them and sometimes they can barely miss them, especially when the debuffs spawn near a wall. The poison and instakill debuffs are nice on mobs, but it feels like a waste when trying to use them against bosses. They could be adjusted to deal an amount of damage that scales off of your damage stat when a boss picks them up. It would be rewarding and pretty satisyfing if you were precise enough to be able have a boss pick up a poison debuff while you have a damage buff active. Stun also doesn't do anything on bosses, but they are able to pick them up anyways. It could be adjusted to reduce move speed on bosses. A visual cue showing the pickup radius of drops would be nice as well.

For the buff proc, I think it would be cool if there was a pick up that rewards a tiny amount of ultimate energy (if ult isn't on cooldown). The description also needs to be updated to indicate that the reflect buffs drop.