Advice for AST noob?

[Cynfael]

So, I know about all the cards and what they do, but I was wondering what classes I should use them on first(like what class has priority)

This is what I am thinking of so far.
Bolt: Tank
Balance: Ninja or BLM priority, any other DPS class if NIN/BLM not there
Arrow: A DPS class
Spear: Dragoon or Ninja
Ewer: any magic class with low MP(WHM priority). Tank if all magic classes are doing fine with MP
Spire: Whatever DPS is lowest on TP

Bole: In theory, tank. In reality, almost always Royal Road fodder or Redraw it
Balance: pretty self-explanatory
Arrow: BLM loves you forever for this. As Marina noted, TP-munching Jobs may not appreciate it so much
Spear: Redraw or RR it unless you have a very specific reason for using it
Ewer: Redraw or RR it unless someone actually needs it
Spire: Redraw or RR it unless someone actually needs it

Basically take any super-situational card and do something else with it if you can't see a need for it.