Ya sk can farm the T-staff in karnors at the Jail camp above the BG room..some random stuff i use to camp that doesn't require charges and are like 18-20 min repop static farming are:
HS embalming fluid is easy to farm for like 9k
https://wiki.project1999.com/Fingerbone_Hoop and you get a shot at hand of the reaper and steelflint dagger from the crypt feaster
The crypt excavator in eastwing
https://wiki.project1999.com/Helot_Skull_Helm
Sebilis Crypts Hierophant and Duke, but they are mostly camped by enc's/shamans
https://wiki.project1999.com/Hierophant's_Cloak
https://wiki.project1999.com/Jaundiced_Bone_Bracer
Sol.b Efreeti for his ring as Sk you can just run in and flop to start farming it
https://wiki.project1999.com/Djarns_Amethyst_Ring
lower guk froglok tactician was prolly the first thing i started solo- farming cuz the crown was like 2K and you can get the mob faster than an enchanter
https://wiki.project1999.com/Platinum_Tiara
The hole - Dartain the lost and irslak the wretched.. these guys are usually left up and SK can get to haunted towers from ent faster than any other class
https://wiki.project1999.com/Withered_Leather_Tunic (prob need reaper if hes dual wielding)
https://wiki.project1999.com/Withered_Leather_Belt
there are tons in chardok assuming you got a willsapper you won't need charges and if you had Bio orb or alot of patience there's a way to solo the courier/underboss M both of which drop like 7-8k items. i seen Keerarae in there a lot farming so you should try asking em and is only other SK i know that actually solo farms wit willsapper
i've never tried fellspine tbh i only seen that mob cpl weeks ago on my wizard when i went to YT/misfits raid. He doesnt look any stronger than chardok mobs so if you can get on top of his spawnpoint i assume you could..
there's more stuff they can solo but then it'd require reapers/worts/DS potions and a "slight" chance to obtain the drop you want to recover the funds to recharge all yer items.. fun to do but not something ya wanna do all the time