[Kergan]

If it is anything like the last server they will likely have some form of focus items in the game for casters, or possibly non classic spells available for purchase from a vendor.

Amazon lists the Titanium client release date at 1-10-2006, and if you use lucy to view the spell history for ice comet for example, you'll see the changes made leading up to that (unconfirmed) spell file date:

2005-04-12 13:05 Changed Casting Time from 6.3 seconds to 5.0 seconds
2005-04-12 13:05 Changed Mana cost from 400 to 203
2005-04-12 13:05 Changed Slot 1 from "Decrease Hitpoints by 1110 (L49) to 1120 (L50)" to "Decrease Hitpoints by 808"

So while it should do about 27% less damage than here, it'll cast roughly 20% faster and cost half the mana - before any focus item changes.

Also take conflagration as an example.

Here:
625 dmg for 250 mana, 5.5 casting time

There:
2005-05-09 19:12 Changed Wizard level from 44 to 43
2005-04-12 13:05 Changed Casting Time from 5.5 seconds to 5.0 seconds
2005-04-12 13:05 Changed Slot 1 from "Decrease Hitpoints by 606 (L44) to 622 (L48)" to "Decrease Hitpoints by 900"
250 mana cost

And Rend:

Here:
684 dmg, 280 mana, 6.3 casting time

There:
2005-05-11 14:37 Changed Slot 1 from "Decrease Hitpoints by 855 (L49) to 854 (L34)" to "Decrease Hitpoints by 855 (L47) to 854 (L34)"
2005-05-11 14:37 Changed Wizard level from 49 to 47

From what I remember from playing the progression servers, you basically have conflag, rend and ice comet all doing roughly the same damage but different elemental types. Ice comet isn't the only nuke you use, its situation depending on what resist you want to go after.