Complex sentence: Nick Roughan of The Skeptics became crucial in shaping the group's sound and by 1988 the group had evolved into a tight professional outfit, providing support for international acts like Hunters and Collectors at Wellingtons Union Hall.
Split into simpler sentences: Nick Roughan of The Skeptics was now crucial in shaping the group's sound and by 1988 the group had evolved into a tight professional outfit. The Skanks provided support for international acts like Hunters and Collectors at Wellingtons Union Hall.