What has been your experiences with brawler on master?

I’ve been using the brawler class (Cole) with the scorcher card and it so far it has been underwhelming. Burn takes them down slowly but it seems I could do much better with JD/Keegan class. I usually end up down since they just shoot me while I am burning them.

Also…sometimes it puts them in a DBNO state in which I have to do Cole’s slow stump to kill them before another drone revives. The cards I use are

Perk up - lv 4
Pyromaniac - lv 5
Play with fire- lv 5
Scorcher master - lv 4
Inner fire - lv 4

Any suggestions to make the class more useful on master? Maybe I am playing wrong or need different cards?