Gauntlet of Fire: Better than it seems
Alright, so, most people who read the codex and look at the profile for the Gauntlet and the Warscythe, and wonder why anyone would take the gauntlet over the warscythe, I will answer.
Now, the use it has is dependent on your enemy, but there are a lot of lists that the gauntlet of fire works much better against. These are primarily lists that are more horde-y. Guard spam, green tide, so on. You will get much more use from the gauntlet than you will the warscythe, and it is cheaper too.
Against MEq or lots of tanks, you want the warscythe because of its power weapon status and its +2 str wound resolution (Which effectively takes the model holding it to S7). However, there are two things to remember:
1: Gauntlet gets a flamer template, and its shooting attack is nothing to scoff at.
2: In CC, it rerolls to hit and to wound. You'll end up dealing a lot more wounds with the gauntlet against things like Orks which have WS4 and T4, but can still throw lots of models at you. You reroll two 4+ rolls, whereas with a warscythe you get un-rerollable 4+ and 2+.
SO with three attacks:
Gauntlet (vs 6+ ork boy armor):
1.5 pass. Reroll.
2.25 roll successes.
Of those, 1.125 pass. Reroll.
1.72 models killed.
1.25 models killed.
Plus you get that shooting attack with the template, and for lower cost.
Against things with better armor saves, you want the warscythe to deny armor saves. But against thinks like Boyz spam, gauntlet is definitely the way to go.