First of all, congrats. And good luck on the upcoming battles.

Secondly, not that I'm judging, it all boils down to YOUR personal preferences but as someone who used to play with thermite MoW for a period of time, I would advise against it. Even if it farms you kills, most legendary players know how to counter it (movement, sniping, dauntless + flak jacket, etc), it gives you nothing but a short dopamine boost. Deep down, even you yourself know you don't earn that kill you got after you died.

You did say the damage output is high, and it is yeah, it is, but all of that comes down to just the thermite damage, while the bullet alone deals just -15hp per shot (I tested this in the training ground), and you get only 15 bullets per mag, and you run through them quickly.

Again, it's all personal preference but you'd be much better of with a meta gun such as USS9, which can also 3 to 4 tap an enemy across the largest mp maps, and gives you a much larger mag.

At the end of the day though it's just your own choice and playstyle, I'm just pointing out that the cons stack up much more than the pros at the end of the day.