In these 20-teens, almost nobody who has a DSLR has only one camera. Most of us have an entire camera crew in our back pockets. If you too have a smartphone, put it to work as a second camera . Put your phone on a tripod (or a chair, or stick it to a wall with earthquake putty) for a static wide shot of the ring. Operate your DSLR, recording continuously and moving occasionally for different angles. Multiple angles from the DSLR will cut nicely with each other and your static smartphone wide shot for a fast-moving summary of the fight.