With the addition of Nex, they included the bank there. I've been sending sara trips yielding 100+ kc. If I leave GWD, I'll have to use either a key or get KC again. However, if I teleport out via altar and head to Nex and bank there, my KC counts towards sara still and I can just jump back in.
Spiritual warriors and spiritual rangers, as well as Nex's mages, provide two essence per kill.
Blood Reavers provide three essence, with the occasional chance for four.
Spiritual mages provide five essence, with the occasional chance for six.
With the info above, its super fast to get KC for Nex. Once you bank at nex, you can consume food to bring you HP to full, go into Nex room, wait for Nex to spawn, and then altar use + teleport out. Made a video below for example.
So, is it worth doing this method? Or would you think ecu keys would still be faster - considering you can get pk'd and go dry there I feel like banking at nex is best.
(ignore the ttv, as I dont stream anymore, it was just my old layout. I also didn't realize I didn't hit record till I was done getting KC... lol)