Weak conditions can be very strong. Different mages care about them different amounts. An Earth Wizard is typically completely indifferent to weak conditions, a Priestess finds them mildly annoying, but can easily remove them, and Beastmasters, Warlocks, Forcemasters, and Warlords immediately hunt down Gorgon Archers and tear them into bloody chunks because weak conditions are TERRIBLE for them. The other solution is to just summon more creatures/use attack spells/use direct damage.