For weddings and events, an always-on ring light is usually not a better substitute for flash. Continuous ring lights are typically less powerful, have much shorter effective range, and drain battery faster when left on. They can also be distracting in their own way, and a ring light or ring flash still gives fairly frontal, flat-looking light.

A speedlight remains the most practical portable option for event portraits in low light. To make it less harsh and less obtrusive, use a diffuser or other modifier to soften the light. Also be selective: limit flash use when the setting is formal or quiet, and avoid unnecessary shots.

Other helpful options are using a fast lens, image stabilization if available, and support such as a monopod or lightweight tripod when appropriate. For group photos, you’ll usually need to stop down more than f/1.8, so flash is often still useful.

In short: stick with a speedlight, soften it if you can, and use it thoughtfully rather than replacing it with an always-on ring light.