Hello it's not about the class, or the race, What is best to play, it's how much you trust the character your gonna make. And up to what limit can you go playing that character. I myself don't do interact much inworld ingame with anyone. Especially if there isn't any point to do so or there isn't anything that i need, Maybe in broker if is some items that i need from other players. In dungeons no matter how hard mode it is, i seems to always came out alive without dying any way so no point for doing party for me and done almost anything in solo even in 5 person hard mode dungeons.
It's all about how you optimize the game settings to make it run smoother and faster, and focus 100% only in power rating of the character to go up as much as you can. where it will make the most highest damage dps it can make. Cause in the end of the day there isn't anyone to rely on except yourself.