The Gaia isn’t bad then though I can’t speak to tc quality as I don’t own one. The legend is new so it’s tc is unknown afaik. It IS bigger than the Gaia which may be a killer for you. The smoant cylon is a more modern smoant mod and should be cheaper. It may not have the form factor you want though. You can also pick up an older dna75 two battery mod for about the same price which will have unbeatable TC. For around $100 there are
dna 75Cs or dna 250Cs that will also have replay.
As to firing quickly that’s to some degree a factor of what
coils you are using. Two
batteries will help though.