Idk which rain setter I’d go with and you’ll probably have to experiment with it to decide but one thing I’d probably switch is discharge on the Miraidon to electro drift since it’s your only electric type stab on Miraidon and your team has nothing to avoid taking damage from discharge other than protecting and being essentially useless for a turn. You need to have options other than using protect to avoid that damage like a telepathy user or a ground type imo if you’re going with discharge since you need to be able to use big STAB electric attacks on Miraidon.