Oh, and don't forget, individual knowledges are those you are better in. You can still use knowledge untrained, it's just harder to do. To get specifics on mutants will require DC25-30. You get +5 if you are using ARIS, and -5 if you are untrained. I apply the same -5 to checks in untrained knowledges of all kinds.
Johan will need repair, for his armor upkeep.
I'm not sure when Issue 3 will end, but you'll be able to spend points based on what you've done, so training time won't be an issue really.