I run a 1512 2.5d on 5s with a modded MM. It does get hot but it works. I've got it geared as low as I can (11/46) but it's much better for the track on 4s, stays fairly cool. 5s is great for high speed bashing. Yours is lower kv than mine so should be better but I'm not too sure about amp draw, might be heavy.
I run a 1512 on a stock MM on 5S with CCBEC and a fan. No extra caps. I don't have any heat problems.
Only issue I have is that my two MMs used to initialize a 5S pack right off the charger and now I have to run the voltage down from 21v to about 20.7v in order for the MM to work properly, otherwise it just runs the motor for a brief moment and then shuts down.
“Everyone has a right to be stupid; some people just abuse the privilege.”