For Kili And Lavita, Argholas prepared a battleground where they can fight the challengers freely. The battle ground is a lot wider than that belong to Jada.
Unfortunately, The battleground Argholas made is quite simple as Argholas didn't have any building materials to make a better place. Argholas just made sure the ground is hardened and won't break easily.
Argholas also prepare a simple cave where Kili and Lavita can rest. From their current outlook, Argholas think of them more like a monster couples than that of intelligent being. They of course already get their intelligence back after they become a Guardian. They just need go readjust with their new body as their previous human or mutant body far weaker than their current body.
