Best weapons combo/playstyle for heavy please?

I've seen many discussions around weapons but I wanted to ask for deeper advice on heavy loadouts/ playstyle. I've maxed out the primary heavy bolter, melta and plasma and the secondary heavy pistol, normal bolt pistol, plasma and inferno. What's the best punch combo for multiple hellbrutes/extremis on harder difficulties?

So far the instant punch and range of the primary plasma keeps me fighting and damaging. And the close up damage of the inferno is good for 3+ majoris at the same time. Or plasma pistol with the 20% damage perk that never turns off (no reload). Also I've been doing multiple stomps at a time 2-4 which seems really help with crowd control if timed right.

Any advice for load out or play style with the heavy?