I'm all for trying new things to find what you prefer the best! That said, I listened to bunches of your festie stuff from 2016 and I personally loved the SPC4/AKG mix. The SPC4 omnis gave a really nice lowend/bass response, but with that classic AKG highend sizzle! But I do agree with basically what everyone else said. Shotguns never really had a great "live" feel to me either, since they were usually sooo lacking in the lowend and too much high end fatigue IMO, unless they're mixed with some cards/omnis!
I think you'd have way more options getting rid of the shotguns and getting some hypers/ck63's! Those were total workhorses when I had my old 480 bodies! Basically, once I bought some ck63 hypers, my ck61's and ck62's BARELY saw any live music lol
Then like you just said, you'd have a pair of 4061 DPA Omnis, a pair of ck61 cards and ck63 hypers! IMO, that will cover you for ANY situation! I've run omnis/subcards/cards/hypers/supercards, and now I ONLY own mk4 cards and mk41 supercards for a reason! Because they BOTH pull VERY consistent results. Period. Yeah I'd like an mk8[fig8] or two, but it's definitely not NEEDED! Omnis/Cards/Hypers, check! They'll get the job done. ALWAYS