Everything I recommend in this guide is with
Gold
Gold Description The basic currency of Britannia. It is made of gold, and is thus used as the common currency everywhere. Sources AdventureQuestSell and in-game resources, NEVER spend
Diamond
Diamond Description Valuable currency that is hard to obtain in the continent. Used for summoning and purchasing various items. Sources AchievementStage Clear on any of the shops unless you are a spender or trying to min-max.

Boss Summon Ticket: Stonehenge
Boss Summon Ticket: Stonehenge Description When used at Stonehenge, the Stonehenge boss is summoned. (x5)
Golden Compass: Stonehenge
Golden Compass: Stonehenge Description A magical compass that can charge Stonehenge's time.
Gold Ticket
Gold Ticket Description Ticket required to enter the Gold Dungeon. and
Purple Ticket
Purple Ticket Description Ticket required to enter the XP Dungeon.
Basic Book of Experience
Basic Book of Experience Description Character level-up material. Sources AdventureXP Dungeon (x1,000)
Dragon Treasure Box
Dragon Treasure Box Description Grants random pieces of Dragon equipment. (anytime you have 100 Dragon Tooth)
Skill Page
Skill Page Description Character skill upgrade material Sources Exchange Shop (x10)
Mystic Stone
Mystic Stone Description Currency used for unlocking character specialties (x5)
Regular Refining Stone
Regular Refining Stone Description A refining stone used for refining equipment. When used as a refining material, it increases the value by a random value between 1 and 10, with equal probability. Sources CraftExchange ShopParty Dungeon (x3)
Fairy Queen Token
Fairy Queen Token Description Used for crafting and guild donations. Sources Britannia Contribution BoxParty Dungeon (x10)
Basic Book of Experience
Basic Book of Experience Description Character level-up material. Sources AdventureXP Dungeon (x1,000)Only when needed
Boss Summon Ticket: Stonehenge
Boss Summon Ticket: Stonehenge Description When used at Stonehenge, the Stonehenge boss is summoned. (x5)
Dragon Roar
Dragon Roar Description Unleashes the power of the dragon, increasing attack speed and critical damage Main Stats Attack Speed: 10%Critical Damage: 25% Duration 60 min. Target All characters Sources Exchange Shop (x10)The crafting stones are a must-buy (
Radiant Stone
Radiant Stone Description A crafting material that can be purchased with Raid Coins. Sources Exchange ShopRaid Shop ) and will impact what other items you can get since they cost 10,000. You unlock these crafting pieces after chapter 27.
I personally skip the character and pet summons unless I have extra currency, since the souls you get are not that much.
I clear the whole shop BUT
Mystic Stone
Mystic Stone Description Currency used for unlocking character specialties . If you have spare currency before the weekly reset, get them.
When it comes to
Fated Legacy
Fated Legacy Description Collect 50 to guarantee a 5-star character summon. and
Inherited Will
Inherited Will Description Collect 50 to guarantee a 5-star pet summon. , I buy them only when I have spare currency since they’re kinda expensive and you need 50 of them.
I clear the whole shop BUT
Basic Book of Experience
Basic Book of Experience Description Character level-up material. Sources AdventureXP Dungeon . This depends on your PvP rank.

This shop changes a lot depending how you play the game. I personally buy:
Skill Page
Skill Page Description Character skill upgrade material Sources Exchange Shop (only new players if needed. Long term you don’t need many skill books)
Golden Compass: Stonehenge
Golden Compass: Stonehenge Description A magical compass that can charge Stonehenge's time. (only if you care about progression and can afford them)I buy
Gold Soul
Gold Soul Description Can be acquired by tapping the Succession button in the Transcend tab after acquiring additional fragments after a character / pet awakening. on the mileage shop since it’s cheaper to convert them that way.
There’s also a character and pet multi here, get them every monthly reset.

Similar to the soul shop, this changes a lot depending on what YOU want. I personally buy:
Gold Soul
Gold Soul Description Can be acquired by tapping the Succession button in the Transcend tab after acquiring additional fragments after a character / pet awakening. for the soul shop (20 per month)
New Year Eve Bell
New Year Eve Bell Description A special bell that can be given to Karen in town to enter the Secret Cown Dungeon. Sources LabyrinthExchange Shop only when you have extra mileage