The group locally had a game with six players - and decided to play on the easternmost (India) part of the board.

It took us a bit to make a decision where to put the boundary, and I do not think we did it very well, either.

So, where would *you* draw the edge of play for those six nations and why?

Hmm... hard to tell but my first impression would be the following civs:
Persia, Chorasmia, Indus, Kush, Dravida, Maurya

Use the western border of Dihistan, Nisa, Hecatompylos, Zagros, Susiana, Liyan.

Use all the major sea zones bordering and allow passage through the sea lane of Maka but no landings...

Its really hard to invent borders on the fly...

What did you use?