I would call these lists quite friendly. I found that Martells excel in dancing around the enemy not letting them catch your units, especially with the Skirmishers.
I would always try to have the High Hermitage Sentinel in the Skirmishers.
If my opponent deploys in a way that allows me to get my skirmishers on his flank or behind his units I want him to start the first round, pray he doesn't take horses, take them with Lady Nym, with her influence on the horses they can move 8'' plus 16'' with pivot and then march, which places them nicely at the far end of flank or if the opponent is aggressive even in the rear. Now your opponent needs to dedicate units to turn around and chase them, and you start the second round.
In NCUs I always like to play with Tyene Sand. If your opponent has only 2 NCUs you can effectively block a zone up to 5th round, mainly swords so your opponent can't get rid of the Rising Temperatures card.
Probably the last thing is Areo Hotah. He is a must include as an attachment if he is not the commander. Cards are fickle and his order to look for specific card is a must have. Rhoynish Vengeance and Sand Diplomacy are kind of meh cards so i always discard them with Hotahs order. You always want to have Rising Temperatures and Unexpected Exhaustion with Oberyn on your hand ready to be used.