If you want a spam spell you might try Stone Daggers (Earth Attribute), it has zero cast time and zero reload time. Kinda beats Flare. (you'll still suffer from the 0.75 aftercast though as with any spell)
Capture Spells, well most elite Spells are more concerned about energy control and other Attributes. Afaik Fire has only Mind Burn as their elite spell.
Mind Burn - Target Foe takes 15-51 fire damage. If you have more energy than target foe, that foe takes an additional 15-51 fire damage and is set on fire for 1-6 seconds.
Unfortunately you can only get it in the very last mission of the game and by the time you have it, you won't put it to any real use. PVP wise Fire really is a bad choice due to its large casting times (have fun with mesmer interrupting you with ease) and being bound to AOE.
You might consider other more generic Elite Skills though:
Glyph of energy - next spell costs 20 less energy (has halved recharge time of small glyph)
Ether Prodigy - Lose all enchantments, you gain energy regen of 4 for about 20 seconds. When this spell ends you get 2 damage for each point of energy left though.
Glyph of Renewal - Next Spell reloads twice as fast
Elemental Attunement (doesn't really fit into a single attribute build but can do some nasty long lasting cast spam...) - you gain 50 % of the energy back when you cast a spell.
If you want to know where to search for elite spells, try this link here:
If you want to generally inform yourself about skills you might try TheEdge
(should check that program though, at one time some guy managed to infect it but gwonline said they took care of it and it is clean again... well... scan it.)
