Where should I farm Luke in Cantina?

"Qleak;213200" wrote:
Farming luke from 1B you will collect shards at 1.5 times the rate of 5A

Farming luke from 5a you will

• collect cantina tokens at 14/13 the rate of 1B. That less than an 8% increase
  
• collect credits at 4.5 times the rate of 1B. ( I think gold has the same drop rate)
  
• Allegedly the purple ability mats have a higher drop rate at 5A hopefully more than 1.5 which is 12/8 (the ratio of energy use 5A / 1B).
  

So far I've been farming 5A for luke, but computing these stats has me reconsidering. I've mainly been doing it because cantina tokens seem like the most scarse quantity relative demand in this game to me. But probably the better reason is for them money :)

Very useful, thanks :)