I do not indicator fly fish (against my NYS Catskill trout fishing upbringing).
Use the same basic set ups you describe in # 2 for nymphing but not as long. Max of 10 feet total length. maxima chamelon for the leader butt in 15 lb also as you.
#3 essentially the same for swinging speys.
Use mainly maxima green 4 and 6 lb for leader to fly and sometimes Rio Flour Flex plus.