What is DarkStar Trainee's Maelstrom?

It is an upgraded Maelstrom that has much higher damage than normal, is pre-modded so your character doesn't have to worry about Weapon Engineering skills, and comes with unique weapon Legendaries that will greatly speed your progress from level 1 through 100. It grants 7.5x Experience gains, allows you to carry 20,000 weight in inventory, and causes you to vanish while crouching and stationary.

There is no better weapon to push you into high level play.