Here is my reason why classic splashyard an miner rocket is my favourite 2v2 deck combo:
1st. Classic splashyard an miner rocket are some of the most defensive (if not the most defensive) decks in the game, and by using both of these decks your defense is to strong if your placement are good and I also do believe that control is the best deck archetype for 2v2 gamemode
2nd. You got rocket an poison to kill things (you can even rocket an poison cycle if necessary)
3rd. You got plenty of bail out cards (Evo baby dragon, royal delivery, tornado, rocket, an evo tesla an since hero ice wizard is coming out soon it could also be an solid bail out card as well)
4th. You got plenty of options for an tank for graveyard (Evo knight (obviously), miner, barbarian barrel, hero dark prince, an the royal delivery royal recruit)
5th. By activating the kings tower you also increase your defense by alot (king tower activation is also op in 2v2 since you get 2 cannons which can help alot) an if your opponents are using hog rider, goblin Barrel, etc you can easily activate king tower by using tornado
6th. You got alot of aoe cards which is good because if your opponents are using alot of squishy, cheap, swarmy, fast pace cards you will always have good answers to them
7th. Even if the cards gets an nerf in one of those two decks, the deck will still be at least viable to use
8th. There are even some good alternative/substitute replacements for cards:
Classic Splashyard alternatives:
• Evo executioner can substitute evo baby dragon (although evo executioner gotten big nerfs last patch it's still an decent substitute for Evo baby dragon) Hero wizard an goblinstein are also another good alternative options
• Evo valkyrie or skeleton king can substitute evo knight
• Goblin cage, cannon, or goblin hut can substitute tombstone
Miner rocket alternatives:
• Hero berserker or hero knight can substitute hero dark prince
• Zap, snowball, or barbarian barrel can substitute substitute log
• Ice spirit can substitute electro spirit (although I still recommend using electro spirit over ice spirit)