For NT, high agility is good to help avoid being pancaked when double-teamed. I don't know why you would even worry about tackling in the beginning. Your high strength is good enough in the beginning to make tackles. You may add a point here and there, but it doesn't need to be soft-capped to start.
Generally, a good start would look something like strength to 60, agility to 48, strength to 68. You can vary this by going strength to 68 first and then agility to 48, but those are definitely the 2 that I'd start with.
After that it can vary. Speed to 30-35. Confidence 35ish and jack up the DLG SA. Stamina 40+, Vision 30ish.