Lower guk is farmabale at 54. FBSS sells for 3-4k, TBB 1.5k, Runed Cowl is 500 or so, SMR around 1k.
Farming Velious gems and vendor gems from Wyverns/Chests in CS is still some XP at 54 and will nab you some cash as too. Tower of Frozen Shadow is fun to grind through, and there's a few items that have some value.
As for twinking a cleric with 10k, cheaper old world gear will get you to a level that you can start raiding. I'd go cheap on gear and save the cash to buy the MQ's for your epic.
https://wiki.project1999.com/Cleric#Pre-Planar You can camp a lot of that pre-planar gear list yourself.
The better necro camps come at 59/60.