Server crash - arbiter fight

steps to reproduce:

1. Form a party of with two players spec'd as Disciple of Varashta with all kelari skills.
2. Enter tier-1 arbiter fight
3. In phase 2, fully charge Kelari's Judgement every time the skill is off cooldown and target arbiter
4. Server may crash

We were on our 5th try of arbiter fight. One party member is usually dead by phase 2. Second party member continues fight until win or death. On the 5th try of fight, server crashed immediately upon dropping a fully charged Judgement (8 swords).

Unfortunately after server crash, the fight instance is gone and all keys are lost. Took us hours to farm those 3 keys. Not sure we're up to redo that work -- nor am I interested in spending 85 chaos to buy them all.

We don't have the motivation to continue after losing those keys. Might pick the game up again after the holidays. Right now feeling rather down about the experience.