As you know, Centurion System forces the target to make a shutdown roll as if the target mech's heat level is 14 point higher. And, it does works against all mechs but against normal targets its range is very short - same as a flamer.
Flamer is ineffective on the era of Double Heat Sink, but what about the combination with Centurion and Inferno?
First, shoot down some Inferno SRMs when you are rush though the enemy. Then, if you are got close to the enemy that was already have increased heat level by Inferno SRM, shoot Centurion and make it asleep. It is not so easy, but if you did it then you can shoot Centurion once per a turn and keep it sleep.
I think that it would be at least better than Flamers. Although Centurion System is not so light and it is virtually a close combat weapon.