@ Yup
You hit on alot of good points.
If you have ADD ED and Gen.'s T3... I don't see a reason to keep grinding Airstrip.
I might keep grinding Samurai for another Shinobi cosmic, as well. It's always good to have toons ready to go tali wise for gauntlet.... even if just to breeze through to S or SS.
What's nice and different is the option to get the Shinobi/Musashi t3's more than once. In the past there was a limit to 1. It's probably cuz of the 6 shinobies and they just didn't bother to change it for Musashi's.
The catastrophic frags were just enough to get the (2) T3's. I know the abilities are lame but I figured a purple t3 has gotta be cool.... like the first one w/ freeze. But, sadly these are lower Hp and the lightning one... I used that ability in Airstrip.... it was like blowing hot air.
Have you verified the Shinobi cosmic grants immunity to Silver?
Just like the description to "Cleanse" says "all negative effects" but doesn't refer to Silver.... so I'm always doubtful if it doesn't say "including silver effects."