So I am lvl 20 or 21 now finishing up a few things so I can start chapter 5. Anyway two questions: First so I can get chapter 5 started, where is the probe that I need to plant at "Oblivia's entrance" that is required to do Chapter 5? I have planted data probes in most of the spots around where Promordia and Oblivia meet but for the first hex of Oblivia I can't seem to find the probe location. Figure it must be hidden somewhere. Any help? OR maybe I need to do the affinity mission that is also required to start 5, "Renewed Will" maybe? I haven't yet because I have been doing other ones, but will that mission take me to where I need to go?

And my second question that isn't really related to that is about using other party members. I just recently found out you can change the party order and play as other characters so should I be doing this? Generally when I go to my gear or my arts/skills to do upgrades and stuff I will check my other party members and just make sure they are using good weapons and I will spend their battle points so their arts and skills are stronger too. At first I was just worried about leveling my character up and leveling through the different classes but are their times that I will need to use someone else or should I be using other characters for other reasons?

Thanks guys. I don't play a lot of RPG's and this one is so detailed I was overwhelmed at first but I am having a great time playing and learning all the intricacies thanks to this sub.