I'm in favor of taking Force Training once or twice, doubling up on the powers you expect to use a lot, and then relying on Force Points to recover powers you really need. This is something that a Jedi Knight with Force Point Recovery can totally do: if you get three free Force Points per encounter, your use of Force Points is limited more by the one-point-per-round rule than your actual total. (You'll be able to spend a Force Point every round, at least when you're faced with a significant threat.)