Hourglass should not be recommended for Walking Calamity

Hourglass supports skills "that you use yourself" which means the 30% More Damage does not apply to the meteors but only to the buff part of the skill.

The buff grants X% damage gains as fire damage which is not a "damaging skill" in itself and does not benefit from Hourglass. Recommending Hourglass for Walking Calamity is therefore deceptive.