You are solo so that's another problem, you can only camp Koios and when it finally upgrade you have to poke your LS. I usually camp Koios and mdk camps Gamayun, and we usually have no problem upgrading to colorfull abyssite on 6 char (takes less than 1 hour) and then getting out tier 2 upgraded within the evening. Generally since mdk has no CC in grauberg, we have 2 brulo 4 maere. It's not as bad as you think. The only issue with this is if your CC are gimp soloers like BSTs and take forever to kill. Totally eyeballing the upgrade rate to emerald is around 1/4-1/5.