Good chapter. My takeaways:
1. Doran sent Elia Sand with Arianne to teach her who she should be keeping an eye on.
2. The echoing of died,died,died in the cave is definite foreshadowing of some, or all of them not making it back.
3. Arianne wins and loses at cyvasse. Early success in the GOT will lead to a screw up elsewhere.
4. Like with her other chapter, seeds of distrust and dislike are being sown between her and Daenerys.
5. Aegon will sit the throne by the end of TWOW.