Thanks for the detailed information!!
So would you recommend getting the parasitic deck from Violet?
Or buying a bunch of those standard packs in the shop to get Parasitic succubus and make a deck that from that?
How to start out efficiently?
One of the game's side quests involves opening a bunch of standard boosters anyways. Hitting up the arena inside black market and constructing a decent parasitic deck are probably the best things you can do for initial set up and getting ready for that one odd side quest. If you can manage to pull off a long enough match with parasitic succubus earning tens of thousands of height is entirely possible in one match and it's possible to have 6 digit height. Just having 10k+ height will make it be possible to realistically hunt the legends of a booster and they tend to be really strong cards.
If succubus island is anything like the previous patches odds are you might want a fairy fire/eruption/meteor deck because it's one of the few things that can still potentially deliver a hard punch with severely constrained mana. Also set that island aside for later.... it had some brutal fights that in the earlier versions that were even more lethal than the final boss Valeria.
Some bosses have powerful regen like Valeria. If you don't got a way to potentially ramp yourself up into hundreds of damage in an attack turn you might get stone walled. Although fire fairy fire/eruption starts weak at least it can ramp up. Don't be afraid to experiment with buffs. Some of them are surprisingly powerful.