Karthus' Q is hard to see

I've recently been playing Karthus and have noticed his Q is hard to see, When in plain sight it is easier to see, but in teamfights or when attacking multiple enemies, it can be harder to see, therefore, I feel like Karthus should get some brighter and more visible particles for most of his abilities.

While I'm on this topic, I'd like to put out there that Karthus should get a VU, he isn't as desperate as some champions like Taric, but he could definitely use some particle updates, and maybe some new ability icons.