I understand your viewpoint. I just disagree. I think 250k would have been more in line with the rest of the requirements for each quest step. I understand you can go farm the index. That just goes to prove my point that credits have been made largely irrelevant. You're arguing the credit cost give value when there are shortcuts in game to earning them. I don't see the value of forcing a player to run the index repeatedly.
The 6 million credit cost to completely build a railjack seems a little high for the casual player. Credits over the years have become largely irrelevant. I'm not sure what prompted this expense over the standard item farm.It seems disproportionate to the rest of the required items.