As emergency responder skills are usually done as a system or parallel in the 'real world' - It is important to have training session scenarios that reflect this as much as possible. It is important to prioritize certain skills on training session scenarios, so you can be assured of the required competence and have a 'followable' framework for your responders. 
It can be hard to design a good training session that encompasses many skills but does not turn into a general skill session or become focused on just one skill. Hitting the balance on the appropriate time spent on each skill on a training session scenario can be hard. For example, take an EMS scenario on a car crash;
- Assess the scene,
- Assess patients, make interventions,
- Liaise with fire crew on extraction,
- Extract,
- Get patient into ambulance,
- Go to hospital, make handover.
That is a lot of skills to go through; the best way to ensure you get the most from your training scenario time is to split your 'critical session learning points' under 3 headings;
THE BIG ONE - Above all else, what is the number one skill you want improved during this session?
THE MEDIUM THREE - What are the three skills you wish to see worked on that are just not quite as important as THE BIG ONE?
THE SMALL FIVE - Take 5 smaller skills that you want to see improved but that don't fit under the headings above.
Here is a sample card that you could use to grade your responders;
Having an open and collaborative environment is one of the reasons we built Decisions [D4H] - Multi-Award Winning Emergency Response Team Software.
Written by Adam Scott, [D4H] Customer Success Dept, EMT & SAR Responder