Crimson Rapture 
Reckoning
It sounds pretty good
Better would be Crimson Rapture,Abomination,Magma,Desolation,but thatās still not the best one either.
Another idea would be Crimson,Sorrow,Magma and whatever heat top weapon (plus Rolling Beasts for mobility),even a Reckoning,Abomination and whatever other combo (but that would be a little heavier).
Builds like the Rocket King are usually the strongest or those that pack 3xMagma and something else.
Anyways,there are a lot of possibilities to make a heater if you have L-Mās.
You can make some pretty solid ones even with free-players items.
Here are a couple:
Dual CL (or CL and Savagery),Terror cry,either Vandal Rage (for a mass heat oriented build) or Deso/Supreme.
Or CL,Deso,Supreme,either Repulser (plus more hp) or Terror Cry (the f2p alternative to the Rocket King).
Thoā¦
I doubt he has any heat L-M itemsā¦
I think he would have put them on his builds if he would have.
(Also,thanks for summoning me;now even the master builed Metre made his way here so feel free to ask him too
)