I would say latias d is better because of his power and you only discard if it ko's the pokemon. It also can get free retreat with latios ex d so I would say the three birds are not worth playing sence lati@s ex is better.
i cant say its good but those 2 cards(zapdos,moltres promo)where really cool.
i came 2nd in my age devision using emrald manetric,camerupt deck with zapdos,moltres ex.lol.3rd week of knowing how to play 2
Moltress ex isn't that good of a card without Zapdos ex and Articuno ex.
Moltres ex has pretty low HP anyways, and having three low HP ex's on the Field is an auto loss.
I suggest you don't play it.