I set up Chelsea's 4-string LTD (
www.aroarah.com) as a permanent drop tuner. It is strung with GHS Boomers in 50~115. She prefers NPS, midway between nickel and stainless.
They're playing a big gig in Bakersfield this weekend, where she will see how it flies. These are the heaviest gauge I could find in NPS 4-string sets. If still limp, I'll do a 5-string set and rework the nut for those big cables.