I’ve just spent a decent amount of TMs upgrading movesets for my defensive mons like snorlax, rhydon, blissey and so on. If all your attackers have best movesets, try to fix your defenders!
You can also play around with mew movesets, try to find the one you really want, that can be fun.
There’s a way to spend some TMs by turning your Rays from dragons to flyers, just for hitmon-family raids. Sunce Rays shine both as dragons and flyers right now.
Hope I was able to help!