I love Invuln (praise @Hyperstrike, hallowed be his name) almost as much as you @Snarky, but Betty is right, Rad is awesome.
I look forward to hearing your thoughts on the matter.
1k words, double spaced.
Not sure if you were looking at def numbers out of mish or not, but new revamps in FM have added -Def to the fire sword attacks.
If the farm you're running still has those attacks on the mobs, then they'll knock what fire Def you do have to practically nothing.
I believe the general consensus is that
Res sets are lacking on Scrappers due to the lower cap of 75% compared to Tanks and Brutes 90% cap.
Most likely why you're having an issue finding a current build.
If you check out the post @Snarky has at the bottom of this page, he has two builds posted. The genius of Snarks builds is he went straight to the source of /Invincible knowledge, the Patron Saint of Invincibility, @Hyperstrike.
That no Patron badge thing could be used on nearly all of my toons.
The only reason I ever switch to redside is to do those mishes and switch right back to blueside.
If I have to provide finances for this new 50, then it doesn't really open up PvP for me.
I don't like farming, and what little inf I do have left over from playing a toon to 50, goes to a new alt.
That's all the feedback I have at the moment.