I believe the concern with having such a strong blast is rooted in pvp balance. But the problem is that the recharges on ice are designed for much stronger damage. Fire Bolt casts 2x faster than Ice Shard and does around 70% of shards damage. You will do 140% more damage with firebolt than ice shards during the same amount of time. Another bonus of fire bolt is that an evade only hurts you for a short period which you can recover from. Ice shard's cooldown makes an evade unforgiving.
Ice is more risk for less dps.
My best build i've discovered for Fire leveling and farming bosses is using only a maxed fire bolt and fire attunement, then splitting the points into cloak, incinerate, energy shield, and firestorm. I know a lot of people recommend maxing firestorm, I used to. But I've discovered that a incinerate actually does more dps than firestorm, so when you cut both skills in half, you get the same dps as you would for a maxed firestorm at a smaller energy cost. A firestorm around 49 costs over 600 energy!!!! I can solo Killian and the war beast trainer without using platinum items. My current build will not win me the kill at boss fights, but it does decent dps. Cloak does amazing dps when used on the tank during a boss fight. It's also a good farming skill for pirates.
I've eliminated energy problems for my mage and greatly increased survival with 300 defense and 135 hp regen. I also wear a bear helm resist to match the opponent I'm fighting. I have 350 crush and 300 pierce. They both help a lot in pvp and with ring bosses.
I'm sorry to disappoint anyone considering ice mage, but fire is far superior over ice. I hope OTM doesn't read this and consider nerfing fire, I would rather see them buff ice by reducing cool downs. Mages have a very difficult time keeping up with rogues in dps, especially when rogues can use haste.
Mage's biggest weakness is survival and energy recovery. Traveling to fight worms from the Deep Caverns leystone is a nightmare.
Lvl 191 Mage, to lazy to level past that.
Lvl 150 Druid
Rhiannon