Sion W charge up time can stay as it is if..
Its damage, scaling and passive scaling increase by 33%
Its damage, scaling and passive scaling increase by 33%
Or here's an idea. Why doesn't Sion's W do damage based on his own bonus, or even max health? Bonus seems like the more likely choice, and even if his shield starts half-healthing ADC's, it takes 3 secons to go off, an ADC can melt that shield in 3 seconds