Is it going to be cold, as a rule? Like, how often would Frozen Magic trigger?
The game is staring in early October, in northern climes. Frozen Magic wouldn't be usable for a little while yet, but by the end, it should find use. If there is a way to delay taking it until 9th level, it would be a lot more useful around that time.
I'm thinking 5 levels of Fighter | Sorcerer, 3 levels of Fighter | (Arcane PrC's), then 1 level of Argent Savant | Sorcerer and top it off with however many levels of Argent Savant | (Martial Classes) I can. Fighter is for using the Armored Mage ACF, although Argent Savant will still be useful for Shield spells.
Just keep in mind the "sidedness" of where your classes are.
Fighter 5//Sorcerer 5
Fighter +3//Mage PrC 3
Arg Sav 1//Sorcerer +1
Arg Sav +X//[Warrior-type base class]+X
That's fine, and if I'm reading right, that's what you meant. Just surprised you plan to abandon the Sorcerer casting.
Nevermind, I see exactly what you did, and yes, that is perfect. The only thing to make sure you are aware of is that the BAB from those "warrior" levels will basically be a waste, as they will merely add onto the Sorcerer and mage PrC BAB. Argent Savant's BAB will add to the Fighter BAB on the first side. Given that, it might be worth thinking about Rogue or something of that nature to place opposite the bulk of your Argent Savant levels.
Okay, definitely going Barbarian//Riposte Scout.
I'm not going Dread Commando, I don't know what I was thinking when I decided that was a good idea.
I'm thinking of the Whirling Frenzy ACF.
Something like Barbarian 5/ xxx 2/ Runescarred Berserker 10/ xx 3// Scout 20. No idea what to take for the filler levels. Also I wish Runescars didn't cost experience and require a mid-high Wis score.
Whirling Frenzy is cool. Honestly, the XP cost from the Runescars isn't likely to have that much of an impact. At worst, you are behind everyone else for one "mission." And then you get extra XP. I really wouldn't worry about it overly much.
How would the Ruathar PrC work in this campaign? My guess would be that, at best, I'd have to render a service to an Alfar community, but that seems a tall order.
A tall order indeed. I can pretty well assure you an opportunity to do so will not come up in the story line I have planned.
Were the planned adventures going in a different direction, interaction with Alfar would indeed be the appropriate direction to go.