Every thing depends on what you want to catch . I have seen some hard core Mahseer angler swear by braided line . Yes you are right that the rocks do present a clear and present danger but believe me if the fish specially mahseer wants to cut you off the rock you will get cut braid or mono
The trick is to not to let the fish take you to the rocks or in case it has get into a position to fight it correctly
In terms of stronger i think braid is more stronger and much smaller in the diameter the only thing is, it does not stretch so you will have t be care full with your drag .
I suggested braid to you because you going to have only one reel in the beginning and although it is an excellent reel it is not a big one in terms of capacity. With braid you can cover all kind of application plus you can have almost two and half time more line on your reel (almost all the reels give you mono calculation for capacity so your 240 yard 12 LB can actually be 300 yard 30lb) or more lb strength of the same capacity. But you can always go for a good Mono.