Rudra was pressed hard on time , because he had no time to waste grave robbing with the military base raid left and himself being on the clock . However with the grave robbing trade being such immensely fortuitous he needed to grasp this chance and fill up the guild treasury as much as possible.
Hence he decided to make a risky call , Leaving Bo , Skyla , Yume , Naomi and Yua to keep up at the grave robbing , he decided to take the OG boys to raid the military base.
This was an extremely dangerous move on Rudra's part as with the 10 of them together the exploration still felt difficult , however taking only 5 members to a military base was practically suicide.
Rudra realized that should he have brought a party of 200 down here it would have been immensely beneficial to the guild . However the more the people the harder it was to contain secrets . With the 10 here he could atleast gaurantee secrecy.