Yeah, you put in Alter Time macro because it will line up perfectly each time, the 2nd and 3rd uses I have a separate bind for which I use basically...
I guess you mean the ball lightnings? Yeah you might as well do a CoC/AE on them before Alter Time, in our raids my Alter Time comes off just before...
If you can play fire really well it will be worth swapping, if you still need to get to practice it etc, I'd wait until you get another RPPM trinket...
If they nerf CM, its a pretty bigger deal than you think... I'd lose like 5-6% crit even if it was only 0.1 reduction... They won't do anything with...