>>29873509I liked your Elite Four but other than Viola the rest of the game was way too easy. And this was on Insanity, with battle mode option on Set.
I completely reworked my team and ended up with Claydol/Mega Garchomp/Mega Charizard/Latios/Xerneas/Weavile specifically to counter the E4.
To beat Malva's Sun-based Double Battle, I used maximum speed Claydol and Garchomp which was EV'ed to have 1 Speed below Claydol after Mega Evolving as Garchomp's Speed stat actually drops when Mega. Claydol sets up Light Screen on the first turn then Sandstorm on the second to remove the sun and activate Mega Garchomp's Sand Force while using Smack Down on Ho-Oh, Charizard and Chandelure while Mega Garchomp used Swords Dance then swept Malva's entire team with Earthquake.
To beat Siebold's Rain-based Triple Battle, I used Mega Charizard Y on the left, Latios in the middle and Xerneas in the right. Because Charizard doesn't summon sunlight before Mega Evolving, it could remove the rain on the first turn without needing to be slower than Kyogre or sacrifice a turn using Sunny Day. Latios set up Light Screen, Charizard Mega Evolved, then Solarbeamed Kyogre, Xerneas used Geomancy and Dazzling Geam to be able to oneshot both Ludicolo and Kingdra before the former could set up Rain Dance and also oneshot the incoming Palkia.
Weavile pretty much swept Drasna's entire team with Choice Band and Technician-boosted Icicle Spear, although it nearly got taken out at the beginning due to her scarfed Hydreigon.
Wikstrom and Diantha were easy enough and didn't require any special setups to beat without trouble.
But the overall difficulty of the Elite Four that forced me to think about my team composition was something that I was looking for when I played Insanity Mode and it just wasn't present in the majority of the game.