You're looking at it way too much through a retail lens. There is no "chronological order" or WOW Classic TBC Gold overarching story to the expansions quests, all of them are contained to their own zones. They weren't really doing great story telling back then. In other words, when you're 68 you could choose Shadowmoon or Netherstorm However, neither of those zones has anything to do with the either zone and are fully contained entities, therefore there is no correct sequence of events. For raidsyou'll have to choose Kara Gruul’s Magtheridon Tempest Keep/Sepernt Shrines (again there isn't an ordered sequence), Hyjal Black Temple, Sunwell. ZA is fun and has a place. However, like all trolls, it's not "in" everywhere.

TBC was originally designed as an expansion, and playing a TBC server would give you access to the majority of Classic games (though it's obsolete). However, they're currently treated as separate games for the benefit of those who prefer the endgame of the classic/vanilla version.

Wow, classic is dead. I'd suggest tbc to anyone wanting vanilla. Are you a brand-new player? If so, I suggest that you consider retail instead. It's more refined and has many high-quality improvements.

Mobs with trash right before boss are given a buff on themselves. It increases damage by I think 10%. Then you tank them until a spell from a mage steals 8-10 stacks. Once the mage has reached max stacks take out the boss and keep the mage within the blue beam for the whole phase. Invoking all the mana tides that you can, while also healing the shit out of buy WOW TBC Gold the mage, too. Arcan can reach these numbers flame and frost around 5k or more.