Nasus QoL Buff: Siphoning indicator.
Both the damage and the enemy defenses, constantly shift throughout the game without relation to each other.
This makes it nearly impossible to get an accurate feel on the right time to use Siphoning Strike. The best thing a good Nasus player can do is waste a few extra attacks to make sure.
Having an indicator on targets that can be siphoned, would make thing a bit more smooth.
With resent champion updates such indicators seem to have become standard.
Edit seems to be rather unpopular, as people think it would remove too much skill requirement. However im not sure how im supposed to develop that skill when I can't even see what I'm supposed to do.
Maybe it would be a better change to give minions a segmented healthbar like champions have? That way you can at least tell how much damage you need to do.