Flame Libra T125ES or Libra DF145BS? Either way, they're both useless because Flame Libra is comprised of outclassed parts, but T125 may be useful in some cases. Libra is banned. Nothing else to say about that.
Thermal Lacerta WA130HF (Correct me if I'm wrong about the parts) doesn't have any competitive aspects to it; I'd advise you to stay away from it unless you want to collect it.
Burn Phoenix 135MS has a top-tier Metal Wheel: Burn. Therefore, Burn Phoenix is the wisest of all three choices.
Burn Phoenix does have a metal Bottom, but you could have read it
here.
Thank you Pyro for this sick sig~!!