Latios is good in any deck for the ability... The exeggutor is crazy, plus it would go great with the dragon potion...and would be a good addition in future dragon type decks...
In my opinion there are so many ways that this would work well and not... this is a really good card and would help against strong meta deck, but in my opinion there are better ace spec cards that are better...
The illumise is a nice little something u can put into your deck and would work with the buddy buddy poffin, to try and get some of you opponents pokemon cards out. plus most people go first so this would work really well.
That Okidogi got some strength 230 hp + 170 attack for an extra dark energy, i think dark patch is still in meta so if u add that Okidogi will be an unstoppable card and adding the Ace Spec Heros Cape that 230 becoms 330, so new op meta deck be fighting.
The Rock Ogerpons's ability is nice, i love any damage rejection abilities. also this would possibly make a nice deck along with the "Ogre's Mask" item...
That Wugtrio ex is actually really good, with something like bax + chien pao deck on its side it could do really good (without manaphy of course). the ace spec cape and belt are amazing too really op
Miraidons first attack is a really good card to start up future decks (would be harder without VIP pass now being rotated soon), probs would go well with the Iron Hands without the help from Bax. nice art to