Grievous Wounds keeps squishy snowballers in check. Use it more often.

The moment anyone starts to snowball they tend to rush a juicy lifesteal item to abuse their powerspike.

Grievous Wounds is damage control in these situations. Suddenly that doesn't get to lifesteal their way to an early quadra.

Suddenly the damage on them sticks and they go down after taking out only 1 or 2 of your teammates.