Korrupt
Blackwing Lair Raider
Why would you shape Arsenal? It has only one boss and map layout is terrible.
The XP/Hour in Arsenal at 99 (as RF Trickster) kept me in the 60-80m range. I had a support and 4 friends running EK Nova for 6 hours straight and every map was done with pack size and sextants for purely XP reasons only. That's pretty close to Shaped Shore with Sextants or Poorjoys on the higher end with a good 5 people + support also. There could be a huge multitude of reasons people run any map. People run some maps for div cards, currency, or targeted drops like Steel Rings in Volcano or Gripped Gloves in Racecourse. The Vault got super popular last league because of the div cards for example.
TLDR shape anything you want for whatever reason you want, its more about fun than what Reddit thinks is the meta.