Flare is a weak, very fast cast / recharging single target skill. You might wonder why anyone would take a skill that does about as much damage as your default wand attack, but it can be useful when combined with skills like Aura of Restoration, or when used in conjunction with a Hex like Mark of Rodgort about runescape gold.
Immolate is a non-projectile single target attack - and is easily recommended to bring. The damage it does by itself is modest, but it also sets targets On Fire, a condition whose damage is not in any way affected by a targets armor level or resistances. Because of this, combined with its short cast / recast times, it makes an effective choice at putting down enemies low on health and trying to flee about runescape gold.
Incendiary Bonds is the multi-target equivalent of immolate. However, its overall initial Fire damage is less, though the On Fire duration remains the same compared to immolate about runescape gold. The Energy cost, cast time, and recharge times are all higher than they are for Immolate - so it is up to you to decide if it is worth it for a multi-target skill.
Meteor, as the name might suggest, drops a very large flaming rock on an unfortunate opponents head. The damage is roughly the equivalent of the Fireball spell, though the Energy cost, and recharge time on Meteor are both higher about runescape gold, as well as the spell causing exhaustion. However, the Meteor will knock down its target on impact, so it is possible to use the skill as an interrupt.
Meteor Shower deals as much damage as Meteor, only it hits multiple times. It also hits indiscriminately about runescape gold, so your team could end up taking damage as well as your opponents. Casting time is a long 5 seconds, and the recharge is a very steep 120 seconds - definitely not a spell recommended for new players.