I know this gets asked a lot, but what should I be getting when I get level 3 garrisons? I forgot the place I needed to build for better quest rewards for followers
Right now I only have lumber mill and the enchanting place
You can go to your table and mouse over the buildings any time for all the descriptions. In general for large buildings your two best choices are bunker/war mill and stables. The other three are crap.. garrison maybe if you really like the follower stuff. Engineer and portals are just toys.. though I guess even engineer can be semi-useful. I disagree with needing garrison, garrison is garbage, just less garbage than the other two.
For medium it depends on your playstyle and what server you're on, as well as your resource management skills. In general, I think inn+trading post is the best generic combo for casual play. If you're heavy into pvp or on pvp server, gladiator's sanctum is godlike and necessary. Lumber mill should be taken as your first medium until you're a bit into 100, it will put you roughly 1k resources ahead of someone else leveling the same pace as you without mill. The rest are more specific to certain playstyles or professions so you can substitute in as you like, but I'd say the INN for pve servers and the PVP building for pvp servers works best, then add your flavor.
I'm actually bitching more about the enormous lag over the last week that's made it impossible to do than the difficulty. I'm crapping out around round five in frost spec. I know what order to kill stuff in, so it's probably a rotation issue (I normally run fire).
I did all 3 with arcane, but frost is definitely the easiest due to how easy it is to keep fingers up with your elemental. Also, stop playing fire, it's not good.