If you’re trying to improve your dancers’ fundamentals, it’s best to drill in such a way that they’re pushing themselves to maintain proper form even when they’re tired. so that when they’re on stage and they feel gassed, it's in their muscle memory.
One exercise I found to be particularly useful for my team (Spartan) is similar to circuit training. Gotta shoutout FCB for introducing it to me. Essentially you pick a step, run it for 1 minute, break for 1 minute, and repeat. Something like 5-7 repetitions usually does the trick. Then rest for 5 minutes, pick another step and do the same thing. you can do this for any number of basic steps.
It’s nice for training purposes because you can make this harder/easier by increasing/decreasing the number of repetitions, the length of your break periods, and/or the length of each circuit. So at the beginning of your season, you could for example start by doing x move for 45 seconds at 5 repetitions then work up to doing the same move for 1 min at 7 repetitions over the course of x weeks. I’d recommend trying it out on your own first, and seeing what intervals/repetitions/circuits work for you before running it with your team.
The point of this is to improve fundamentals, so you have to make sure you’re able to give your dancers manageable critiques that they can actually work on at each practice. it helps to take videos of the last repetition of each move you’re drilling so that you can see what people are doing when they're most tired, and provide those kinds of critiques after practice if you can’t in real time. videos also allow your dancers to self-critique and see exactly what they’re doing differently from the captains/everyone else, and as a captain, you can see who stands out and what your team as a whole needs to focus on when they’re tired during a set. with this exercise especially, you have to make sure your dancers are consciously making the effort to maintain good form above all else otherwise they’ll just be reinforcing bad habits/bad form. Its not an exercise you can just run through mindlessly and expect improvement.
I know its a tough time for dance teams right now, especially collegiate teams trying to train dancers remotely. would be more than happy to talk more about this kinda stuff with you so if ya got questions about this or anything else, feel free to reach out!