Quests

Questing in Rage of Bahamut is the player's primary source of experience, rupies, and cards. As you progress through quests, you will earn stronger cards, and more rupies, though the rupies you earn per stamina spent increases at a very marginal rate, but bosses will drop significantly more rupies. Event quests do not follow all the rules that traditional quests do, and different Event quests may not follow the rules of other Event quests, so before you start into one, you should read the notes on the quest in game, or read up on it once I get a comprehensive post up.

Terms-
  Chapter: The 'level' of quest, each chapter has 5 sections.
  Quest: A specific objective within a chapter, while these are mostly for the sake of lore, and will not at this time be reflected in actual gameplay at all.
  Boss: The final enemy of a chapter, which you may engage with fellows, and their lead card, and can be assisted by up to 2 order members and their lead card. Boss battles are fought differently than traditional battles.
  Treasure: Items that can be found in specific missions, that when you collect the 6 parts can be turned in for powerful and rare cards.
  Holy Powder: Replenishes your ATK and DEF points, useful when farming treasures in battle, or when being bombarded with attacks.
  Cure Water: A very valuable commodity that replenishes your Stamina completely, allowing you to continue questing without waiting to regenerate.
  Progression: The latest quest available to you, costs the most stamina, grants the most experience, drops higher level cards, and grants an award point when completed.
  Class: Human, God, Demon. The type of card, skills can be limited to certain classes of cards.

There are a few things to keep in mind, depending on the style which you want to play the game.

1.) Maximizing experience gains - (fastest level gains, and most play time)
   Quest in Rage of Bahamut is pretty normalized. In standard quests, you will earn experience equal to the stamina you spend questing. Experience will be earned and stamina will be spent for each monster defeated in a quest. When you complete a quest, you will earn 1 stat point. If you are maximizing experience, you will want to focus on Stamina. after the 5th quest of every chapter, you will encounter a boss, which when defeated will award you with a nice sum of rupies, a Holy Powder, and one of the most valued items in the game, Cure Water.
  A unique benefit of low level questing and focusing on Stamina as your primary stat is that you can level up in 1 or 2 bars of Stamina, and complete chapters in 2 or 3 bars of stamina. Since your Stamina is refilled when you level, you can effectively complete the first several chapters faster than you will consume Cure Waters if you wish to power-level at the beginning.
  Event quests will offer you an increased ratio of experience to the Stamina you spend, but will not award you bonus stat points. This will speed up the leveling process, but you will end up with less stat points per level, but the difference becomes less and less significant the higher level you become.
  Quests can only be 'completed' once, but can be farmed after completion for cards, treasures, or to gain that last little bit of experience if you do not have enough to complete a progression quest.

2.) Maximizing your deck - (Archive building, and many reliable cards)
  When you obtain a card from a quest, you will be able to see that card below the name of the quest when you are browsing your available quests. This is very useful when evolving cards, or trying to fill your archive (each evolved form of a card counts towards your archive bonus). Quests in chapter 2 only cost 1 stamina, and a chest will drop every 3 enemies (3/4 chance for a card in quests that do not drop treasure), making for very efficient card farming for enhancing.
  You should not focus primarily on farming cards at low levels, as this will drain your rupies fairly quickly, and you will be missing out on very valuable stat points from completing progression quests. Archive bonuses will take several hundred quests, or even thousands of quests to complete, but it will become worth your time to complete the archive MAX bonus after you build up a reputable pool of stamina.
  Each quest will drop 1 of each class of card, and more than 1 quest can drop the same card. compare and contrast which quests will give you the cards you want, for the least experience. Keep in mind, Event quests cannot be repeated or farmed beyond normal progression.

3.) Treasure hunting - (rare cards, PvP elements)
  Treasures can be collected to obtain rare and powerful cards. A few quests a chapter drop treasure, and once you find a treasure in a quest, that is the only treasure you will find in that quest. Treasure has a 1/5 chance to drop, and you can tell right away which quests drop treasure, because it has 4 boxes below the name instead of the normal 3. The different types of treasure are grouped in 5 chapter intervals. Rings are found in chapters 2-5 (1 is unavailable after tutorial), Orbs in 6-10 etc. You may not be able to collect all 6 pieces of treasure through quests, so you will either have to trade for them or target them in battle.
   Treasure hunters will benefit from adding enough ATK power to use their 5 strongest cards in a fight. Having any less will not allow you to use all 5 cards. Players that focus on battling should consider investing further into ATK, but preferably in multiples of their ATK power cost of their decks. If your deck costs 72 ATK power to use, and you have 90 ATK power, 18 points are essentially being wasted since you will have to wait 54 minutes (with no archive bonus) to attack again. If you stay with multiples of the ATK cost of your deck, you will be more satisfied with the rate at which you level or defend. Event quests seem to drop 2 treasures per your race. If you are a Human, the first 2 of each treasure will drop, and you will have to battle for the other 4, if you are a God, the second 2 will drop, and the last 2 drop for Demons. Keep this in mind when you are choosing opponents to battle for the treasure.
  Event treasure cards are typically not obtainable through any other means in the game, outside of trading or gifts form players who obtained it in the event, so if you see a card you want, you better get working on it! Treasure+ is the second level of treasure and is available after you finish the first level of treasure, and will award you with the same card, but evolved to (name)+. Treasure+ is only applicable to Event Treasure, such as during the Easter Event, after you complete the Flowery Egg series, you would be able to collect Flowery Egg+, and the reward would simply be the evolved form of the original.