You dont have to do all at complex 6. In fact, it is sometimes beneficial to do it at complex 1 for the first 10 floors or so. That is if you cannot get a team for 5:5 comp 6 rush team.
What's the best setup-outfit for catching grenwalls? I can use a yak At what level is it best to start on them? Where is the best place to catch them? Should I catch the pawya first before the grenwalls? Thanks in advance