by ShaqPack » Wed Aug 12, 2015 4:54 pm
As the guy above me said, they are great in certain match ups when an enemy is trying to escape or in AV when a ranged enemy shoots a few attacks and then runs back to an npc. Once the missiles lock on, all of them *will* fire even if the enemy is on an epic mount and running away, so you won't have to worry about escape.
Of course, there's a good reason why they aren't used often but they work well if you're spell locked out of your main school, not good for some sort of spec that just focused on arcane tho. There's a few reasons for this, it's an expensive ability, you have to channel it, so if there's aoe, you could essentially end up just losing a lot of mana. More importantly, the arcane tree doesn't have many abilities that buff the spell, no extra damage to crit or anything like that. Even worse, arcane missiles puts an invisible debuff on the enemy - that's how they work the way they do. If you ever start a fight with arcane missiles, you'll notice the enemy aggros you before the first missile hits, the reason why is because of that invisible debuff, so in a raid environment when the boss already has 8 debuffs on, that will just mean your arcane missiles won't finish the cast, because it will wipe off a previous debuff, then on top of that it will probably get knocked off by another debuff itself.