I use the old Redeptionist special character (the one with the big book and the back banner). Unfortunately they dont sell him anymore. He's meant to be a retired missionary by the name of Iversen Cargus who sorta couldnt stay in retirement.
I did add a couple of purity seals actually
and he has a decent enough flamer back pack on already (and several spare cartridges). Also, the flamer itself is made of wood and quite 'kusomised' looking with stylised flames on the nozzle. He also has ornate flames running along the sheath of his powersword and his big command hat thing also has flames aswell. So hes really not lacking in the flamer imagery
Ive forgone the bright red robes though for the more rustic mucky and brown desperate missionary look though. I think bright red would ruin the crazy-man image.
Though he kills me more often than the enemy, and he refuses to preach to my company's abhumans, i do like the vindictive, bigoted and ruthless puritan.
Cheers for the interest "You have no choices in war; only what must be done and your ability to do it"
Arch-Deacon Iversen Cargus, addressing the company