It's hard to setup these perfect board states when, y'know, your opponent is also playing the game
Yes, you can reduce the equip cost on job select cards
Nimbus Swimmer You can certainly pick a worse leviathan than Nimbus Swimmer
The cards are mostly from the new Wilds Unknown set (set 12), with some older cards from sets 9 to 11
Not only that, but its in-game legality didn't raise concerns, and the fact that it was very expensive was fine considering this and also the fact that it was a premium set, meaning it had very strong and valuable cards that in turn increased the value of each pack
The new decks for Archazia's Island definitely feel like they're based on using glimmer team-ups (a trend that's been in Lorcana for a while), which might make customizing the deck a challenge