To farm the Conquest of the «Hall of Ghost Knights», you will use the Golden Firebird pet in the main slot. In addition, you will need the skills «Mythical collapse» on the «V» key and «Exploding arrow» on the «R» key.

The pharma process depends on your level of combat power (BMa). To avoid downloads by fast computers or slow ones, quite long delays are used between moving to the boss and the start of a new Conquest. 
The approximate time of the pharma dungeon is from 10 to 13 seconds.