Can I use mogul skis for regular groomed skiing?

Yes, but with limitations. Mogul skis will carve turns on groomers, but they'll feel nervous and chattery at high speeds due to their soft flex and light weight. They're best for short-to-medium radius turns at moderate speeds. If you try to open up and arc high-speed GS turns, you'll find them lacking in stability and dampening. Think of groomed skiing as a secondary capability, not a strength.