My take on FB Zerker, all gear is self-crafted via harvest and will be hard to obtain without it. While I wouldn't exactly call the build tanky, it's built more defensively than most other FB builds I've seen.

Defensive features:

• 7k life
• Fortify with 25% increased effect
• full Elemental Ailment Immunity
• Overleech
• Acro / Phase Acro (+ can swap in Quartz over Quicksilver for more defense)
• 30% of Phys taken as Ele
• Wind Dancer
• Blind
• Endurance Charges

Simulacrum Waves 19/20 video: https://streamable.com/g7safi

PoB: https://pastebin.com/bzkhTY6g

The build can kind of run 100% delirious T15 Burial Chambers, but not really, the very high attack speed + Saviour clones seem to make it very laggy, especially with Awakened Ancestral Call.

Overall I wouldn't necessarily recommend the build, Frost Blades is trash without massive investment.