While there are alot of obvious tactics for the regular flame thrower, the back burner is amazing you you enjoy playing a sneaky game. If the map is right, and you know it well enough, you can easily take out half the enemy team with the back burner. There are numerous maps where right off the bat I get 6-8 kills letting my team push really far up really fast. Other than the couple of maps it is good on, I would go with regular flame thrower for reasons previously stated by other people
No weapon is truely useless in the game, it just takes the right knowledge on how to use it. Try every weapon and every class and learn all you can about each one. Also, be imaginative with everything (placement of sentries, strategies for any class, etc) While alot of strategies are tried and true, there are more outthere that are unknown that takes people by surprise really well.
BE IMAGINATIVE
No weapon is truely useless in the game, it just takes the right knowledge on how to use it. Try every weapon and every class and learn all you can about each one. Also, be imaginative with everything (placement of sentries, strategies for any class, etc) While alot of strategies are tried and true, there are more outthere that are unknown that takes people by surprise really well.
BE IMAGINATIVE