That sounds like a good Course of Fire. Now you have to decide if it will be timed, how many shots, do they get a spotter, etc. You need to consider how many shooters you have vs. how many you can put on the line at once, and how long it will take to score and reset between relays. You don't want a situation where they have 5 minutes of shooting and an hour of waiting between stages. A lot depends on the skill of your shooters as far as what kind of stages you set up. If they're not very experienced, the longer distances can be quite discouraging when they don't score well. If your intent is to have follow-up shoots, you want them to be excited about coming back for more.
A timed rapid-fire stage at 100m can add a lot of fun too. I like more "action" type stages, personally. But they can be difficult for older guys or shooters with bum knees or other injuries. Your fixed-distance stages put most everyone on a even footing.