Don't pick a class based on spells, skills, starting attributes, abilities, talents... these can all be changed. The name of class can be ignored as irrelevant. The only use of the suggested classes is the starting equipment for beginning encounter survivability.
That's helpful, but I've heard the ability to respec comes very late in the game. Was this incorrect?
It seems to me because of the lack of resources and reliance on luck that the pre-Cyseal content gives people a false impression of what Tactician mode is. I imagine that leads to many people restarting from Classic into Tactician mode later in the game, or restarting from Tactician into Classic mode only to realize the game becomes far easier after the first few hours.