Once I became capable of doing so, every new character gets their full complement of Attuned IOs/Purples sitting in either storage or trays, all of the Teleport P2W powers and a 8 hours of Amplifiers at level 1 (the mini-game within the game) and then their journey begins. The closest to power leveling that I come to is living in a perpetual state of Double XP until 50.
I prefer to team with people when available and save story arcs for soloing when I feel like getting to them. The best are interactive teams that have players with engaging and enjoyable conversation, however, the silent teams are fine. If you ever play on Excelsior, then it’s likely that we will find ourselves teaming at some point. See you around.