Ok, this setup is really possible because of the proc changes, allowing you to control the Imperium proc to shield your group on demand by swapping bars...I already practiced this a little bit...getting better at controlling the proc.
Since I no longer need Imperium weapons on the front bar I can now slot a weapon set...so which one? Puncturing Remedy from DSA(really doesnt matter if its perfected or not). Why puncturing remedy instead one of the others? The self heal is nice...but what we are really after is the armor buff that goes along with it.
So here is what you do....
1. Swap to back bar to proc Imperium in high damage portion of a fight, giving your group a nice shield for 0 resources.
2. On your back bar, before you swap back, cast balance(assuming you have the spare health). Your monster helm of choice for this is Lady Thorn...casting Balance procs Lady Thorn, giving you a blood ball that lasts 10 seconds once every 30 seconds that you or someone else can synergize to apply major maim to the enemy, reducing their damage by 30%.
3. Swap back to front bar and cast puncture, healing half the cost of balance. the armor buff of puncturing remedy and the armor buff from balance will send you well over armor cap even if you are in the mid 20s unbuffed.
It seems to me this setup has a lot of group damage reduction potential....it does require a quasi-rotation to pull off and keep a good uptime on...as well as strategic use of the Imperium proc and the synergy from the blood ball....it also allows you to run whatever you feel like for your second 5 piece set....essentially you end up with a couple of free skills and a 4th set.