Considering the replies I'm getting here apparently I failed to communicate either the proposed changes or the reasoning behind them (this wasn't a nerf/buff thread). Many games don't make it to level 15, so I've never noticed biting chill as tacking on additional damage, but that does make it's damage significantly better. Considering that the ice form is described as a debuffer I'd prefer a lower damage that maintained debuffs to go along with that, but then Sedna is also listed as being squishy and weak... so meh. The description below is my second attempt.
Open up the skill tree for Burning torch, and you should get something like this:
Other Ice Stuff -----------
Deep Freeze --------------
--- Fire and Ice
Fireball --------------------
Other Fire Stuff -----------
Try to spec out the 'other fire stuff' along with Fire and Ice and in practice you will most probably find it impossible to utilize the Deep Freeze Skill; the ammount of time it takes to switch modes will prevent this from being capable of interrupting other demigods. In other words, you've just used 5 additional skill points to raise fireball by 300 damage.
Now try to spec out the 'other ice stuff' and pick up fire ball (for fire and ice) and you will get the circumstance that were posted by Fennel above. In other words, it works.
Trying to mishmash between the two won't be particularily effective as you won't gain the full benefit of deep freeze's damage, in addition to deep freeze still requiring the player be in ice mode most of the time to properly utilize it.
The primary issue, is that it is sad that the 'fire and ice' skill is really an -ice- skill and fire users get hosed by being forced to choose a non-usable skill if they want to max their damage. The other changes were somewhat for balancing, but mostly because the skills would be in different spots on the tree, like this:
Other Ice Stuff ------------
Rain of Ice ----------------
- Fire and Ice
Fireball --------------------
Other Fire Stuff -----------
Rain of Ice lasts for 10 seconds and inflicts damage without needing to cast 2 other spells, thus making it viable to switch in and out of fire/ice mode to cast this, fireball, or other fire/ice spells interchangebly. Obviously since these skills are in different locations, the function of fire and ice needs to be altered to reflect it being linked to rain of ice. Changing around the skill Biting chill to link with Deep Freeze, and making fire and ice perform a slightly stronger slow effect for rain of ice was merely a means of achieving this. If you don't believe me though, try to spec for fire and ice in those three patterns above before you disagree, and post if any/all of those combinations worked or not.
And um.. maple?