Fire Bird Northern Hambridge Goblin Cave Hunting

You decide you want to watch some goblins burn. You look over your arsenal of spells. You have

-Fire Ball - 2 Mp - 6 Dm (Shoots a ball of fire at a target, exploding on impact)
-Flame Ray - 1 Mp - 2 Dm (Shoots a continuous Ray of fire at a target)
-Fire Bolt - 1 Mp - 4 Dm (Shoots a concentrated fire bolt at a target)
-Fire Cloak - 2 Mp - 3 Dm (Cloaks your body in flames, dealing damage to those near)
-Fire Shield - 1 Mp - 2 Dm (Used to block spells and attacks, can also be used as a weapon)


But for all but the Fire Bolt and Fire ball requires you getting closer to your targets. You decide to....