The no-crowns profile I soloed most of Krok/Marleybone with:
Krokenkahmen's Circlet (dropped by Krokenkahmen, no auction) Health boost, storm accuracy and damage boost. Upgrade to a MB boss drop storm hat when possible.
Krokopatra's Robe (dropped by herself, or available in bazaar) Big storm accuracy and damage boost, I think it also has a resist too) Upgrade to Meowiarty's Intense Robe when possible
Watchtower boots (dropped by Nightshade or available in crown shop) or The Great Troll's Shoes (there are two different shoes that have "The Great Troll" in the name, pick the ones that give you a storm boost and/or health boost). Upgrade to Smogger's Germane Boots when possible
Heartsteel (dropped by Prince Gobblestone or available in crown shop) or any athame that gives you a good health boost
A selection of amulets that you can swap between that includes Greebly's Gemstone, Gobblestone's Pendant, Nightshade's Choker, and Rotunda's Torc, These are all elemental shields or a weakness you can use against stuff you don't block
Winged Circle (pip boost, healing boost) or Thinker's Ring (pip boost)
The wand should be any myth wand that gives you an extra starting pip.