What to use Elite TM on?

I got my elite TM today, and needless to say, I'm between a handful of different options. I'm looking for some advice on how I should use it. Options I'm considering are:

•Breaking Swipe on Mega Rayquaza (Has Dragon Ascent as other move)

•Fire Punch on Primal Groudon (Has Precipice Blades as other move)

•Origin Pulse on Kyogre (Has either Surf or Blizzard as other move)

•Shadow Force on Origin Giratina (Has Dragon Pulse as other move)

It's important to note that the IVs on my Rayquaza and Giratina aren't quite as good as on the others. Lastly, if you have any other suggestions, I'll consider it! (Although I may have it already or not have the relevant Pokemon). Thanks!