Complex sentence: Powergamers enjoy being at the bleeding edge of progression of their selected game, taking part in every activity that yields the fastest progression, and bypassing the "lesser" activities or any other secondary job/trait/skill.
Split into simpler sentences: Powergamers enjoy being at the bleeding edge of progression of their selected game. Taking part in every activity that yields the fastest progression, and passing by the lesser activities or any other secondary job/trait/skill.