As far as I understand, for regular play the max TP doesn't really give you more training points. Even at max level you still only recover TP at 10/min.
However, when you start getting into events, you are wasting Pots if you don't have max TP.
1: If you're just starting, and don't plan on rushing your first couple events, try getting the AP bonus skill first, then go for things like Blessing of the Valkyrie.
2: Just don't use Pots at all until you reach max.(especially real pots)
3: Less max TP means you're going to need to do training every 20 min instead of every 30 if you want to make sure you're being efficient.
All things considered the FAQ has some of the best information. Look into it a bit first then decided what would be best.