From the listed 5, my favorite would be Triples and Inverse Battle. (I still prefer Doubles more compared to those two.)
The sense when you think hyper-offense is crucial to immediately take out the three, always never get fooled! You can easily be outplayed if you take a single wrong choice, either from targeting and doing the obvious Protects or using attacking moves with affecting every Pokémon only to get blocked by Wide Guard and get countered by the other two. Not just that, speed control is also important to ensure your Pokémon don't take much damage before they can land a hit to lower speed like Icy Wind/Electroweb or provide support like Tailwind or Trick Room.
The element of surprise is surely high here, that's why I like it better than Singles.
On the other hand, Inverse is pretty gimmick. Ice-Types become incredibly defensive while Steel and Fairy-Types cry, most Pokémon carry out unusual coverage moves that are usually resisted, like Bug and Normal. At least it gives some love towards Pokémon that are literally meh in usual battles.
