Man, got two painfully bad runs on stage 150 with Mega Lucario and wasted 10000 coins just right there. Didn't want to waste more coins than I already did so I ended up having to swap over to Aerodactyl for the first time and used the free Mega Start I still had. Even then I got some pretty bad luck until the end, no way am I going to bother going for 200. Going to go straight for Meowth from here on out.
As for Mega Speedups used, I've still only used mine on Blaziken since getting Mega Evolution in 3 matches minimum is pretty great. I've yet to use any others since I plan to prioritize Megas that I like and are good (hence Blaziken). Garchomp and Banette are tempting just because faster Mega Evolution is the only thing they really need to be amazing, but I'll wait until something like Salamence or Sharpedo and hope they're good.
As for Mega Speedups used, I've still only used mine on Blaziken since getting Mega Evolution in 3 matches minimum is pretty great. I've yet to use any others since I plan to prioritize Megas that I like and are good (hence Blaziken). Garchomp and Banette are tempting just because faster Mega Evolution is the only thing they really need to be amazing, but I'll wait until something like Salamence or Sharpedo and hope they're good.