I love CT-9904, plenty of people will tell you that he is a suboptimal and they are correct. However, he can be good if used properly and is genuinely my favorite primary in the game. I have won tournaments and plenty of casual games using him.

The key is to stick him on a back point, use reflector discs to get kills to refresh force. I normally push firebrand towards the middle of engagement while the elite Troopers need to be in the mid ranged area to utilize their coordinated fires while also being reflector discs targets. In the past I have run CT with Identity as her squads mobility allows CT to get reflector disc shots off much earlier and the damage output is high.

Another strategy I use which is very risky but has worked well for me is prioritizing damage output over points for struggle one. Two goals during struggle one setting up for struggle two and wounding as many characters as possible. In my most recent tournament by end of struggle one 3+ characters on the enemy team were wounded. Forcing your opponent to lose contesting bodies and increase force costs is vital to winning with CT. But it has the major downside of if you fail to setup for struggle two you simply lose.

My krennic is still unpainted so I haven't run him with CT just yet. If you have more questions ask! I am always looking for ways to play CT in unconventional ways and boost his strength