Generally speaking here. .
The Arcane line focuses on enhancing the efficiency of your existing spells, with things like Clearcasting states and making spells Instacast. The Evocation and Arcane Mind talents do great things to your mana pool.
The fire line is great at dealing damage, and doing it fast. It teaches you Pyroblast, a high-damage nuke. This is an upgrade to Fireball, but because of it's long cast time, it's an upgrade strictly in terms of damage. If you decide to go deep into the fire tree, you'll learn Combustion, which lets you literally choose your next crit. Combined with the other crit talents found in the fire tree, you can land a huge nuke on a mob. At will.
Lastly (but not least, imo) the Frost line lends some powerful defense if you decide to delve deeply into it (Ice Block, Ice Barrier are invaluable buffs). Many of the effects focus on slowing or frustrating your attackers, and less on dealing lots of damage to them quickly. But there's some powerful damage to be had here as well. The Shatter talent increases the frequency in which frost spell crit against frozen mobs Ñ combined with Ice Shards, Frostbite, Improved Frost Nova (and Improved Cone of Cold to some extent), you could be looking at some serious combo damage in a very short period of time. However, because the real damage capacity of the Frost line doesn't really appear until late in the tree, it may be a poor choice for low level mages who want to see damage improvements right away. For many of the first points, the frost line is strictly defensive.
Edited, Mon Dec 6 00:45:45 2004 by Jurand
Edited, Mon Dec 6 00:48:55 2004 by Jurand