Posted somewhere else..
Once you finish the NarShadda portion (around 30) she'll spam you with about 8 conversations (at around 10K XP each). That's the end of Chapter 1.
You get the next one around level 32 and you have to head to DK around level 40 and take on two strongs. That's the end of chapter 2.
At the beginning of Chapter 3, you get a quest at level 48 - don't do this one until your 47 or 48 - way too difficult. At this point you should have two things:
1. The end of Chapter 3
2. 10K with Mako
you'll see what happens then.