well level 60 , with the nexus... theres alot of GvG
like 1min before nexus , theres alot of guild who declare war to push another guild away from nexus , alot of fun

Is sky garden dungeon good for leveling lvl 50-55??

ya sky garden is good to run few times

you can also get a secret key dropped from the last boss and that will allow you to enter a special boss stage, etc

:3

Just started playing with a few friends, enjoying it pretty much, not sure what the end-game content has to offer but as far as leveling it is fun.

I love the environment and the.. feel to the game.

lol. tera is a pretty fun game
except all my friends quit playing when there were lvl 25~

I would say just play throught the areas that story quests send you, try to get most of the yellow quests aswell that gives you much exp

Level 50-53 : Darkquaver Woods, Susurrus Woods, and Amena Quatla
53-56 : Doomcrypt, Wyrmgorge, Sienna Canyon, and Tor Exsul
56–58 : Plain of the Damned, Vale of Spires, and Seeliewood
Levels 58–60 Tirkai Forest, Thrallhold, Three Towers, Balder’s Refuge, Khanover Front, Argonea, and Granarkus

Go for the story quest instances once unless you want to "grind" them for better gear. Though that could speed up your leveling later on if you manage to get good drops. You may hit a wall at some points when you have basically none quests to do, I would suggest to buy XP boost and kill tirkai grizzlys near pathfinder post (lvl 53+)
58-60 is super fast just by following the quests in those areas

maybe u could stop using yellow text? not even bothering with what ur saying now