Viserys might be a lot more stable here. Especially if he is Raised by Blue Dragons who are Lawful Evil with very good Community and Family dynamics.
I generally prefer the Pathfinder Dragons to the D&D Dragons. Pathfinder has the Outer Dragons after all..... Maybe F-Aegon the Blackfyre heir gets an Outer Dragon advisor?
I think Robb may end up a Psionic/Warrior or Psionic/Paladin. Sansa will definately have run ins with the Fey as may Domeric Bolton. Arya will likely be a Rogue/Psionic, Bran a Druid/Psionic and Rickon might be a Psionic/Druid that Favours Fauna as opposed to Brans Flora Focus as a Greenseer.... Hell Rickon could even be a Were-Creature potentially if you take inspiration from his Canon Animalistic aspects.
Jon if he does go down the Bard Route may even end up worshipping Hlal/Aasterinian the Dragon Goddess of Travellers, Entertainers, Stories, Learning, Mischief etc.
I think Jon will be a Dragon Blooded Sorceror.
I also think Warging is more of a Psionic Ability than a Druidic or Arcane Ability.
Jon may be a Psionic/Sorceror or if he interacts with Mance Rayder he could get into the Bard Class perhaps.
He is likely to Multiclass at any rate.
So with Dany being raised and granted magic by Bahamut, Viserys getting the same from Tiamat.... Will Jon Snow get an Emmissary from Sardior the Ruby Dragon, God of the Crystal Dragons?
The Crystal Dragons have Psionics which lines up and meshes well with Jon being a Warg which seems more of a Psionic ability than a Druidic or Magic ability.
I just reread the chapter summaries and I noticed something,in version 1 Cersei's prophets say her downfall will begin in King's landing and version 5 says Winterfell,I'm curious which is it?