Setup something that will show the usage in game like HWiNFO and RTSS. If the game has no profile then you can run with 1x1 or AFR mode, setup via Crimson. I don't own these games so cant confirm if they have profiles.
When have they worked well, what happened from then to now?
try running a benchmark like heaven 4.0 , first run it with single gpu , then run it in crossfire , you should see a large difference
that will see if any issues with the hardware/software being used , for x game sometimes cf scales well and sometimes its lower fps then running a single gpu .
most mmo ect. are single threaded and will be limited by the cpu .
totalwar cf support started in 15.3 drivers i believe , you can try rolling back to those as well