What has been the strongest straight-out-of-the-box competitive pre-constructed deck in CFV history?
Pre-constructed decks have always been part of the game, starting with the Trial Decks of RP and Kagero back in 2011. Later, those decks began including Perfect Guards and more copies of the main cards, thus requiring fewer additional cards from other sets. Moreover, products like G Legend Decks or the Majesty Lord Blaster Special Deck Set didn't even require you to buy multiples to have full playsets of the cards. More recent pre-constructed decks have followed suit.
I took a break from the game from early V Series until this year, and I was pleased to find out both the Aichi Icon and Kai Icon decks were very good straight out of the box, although some of the upgrades were very costly (NKO, Scarlet Flamme, just to name a couple)
So, what has been the best pre-constructed deck so far, considering the meta of the time? Something that required very few and relatively easy to acquire upgrades?