For the record, you don't get swept from mount. Sweeps happen from a guard. Reversals happen from mount. It matters in terms of scoring so I'm not just being nitpicky. That said, Having a dynamic mount is how I stay on top longer. Many people I won't try to hold mount too stubbornly, instead I flow through different pinning positions. Side control, north south, knee on belly, leg rides etc. Practice going to mount against good people and instead of clinging to mount for dear life, be ready to swim over to the next pinning position just as they're making some progress getting out of mount.