I find batman, vulko, sylphi, alecia, cara as my main 5 and switching in and out for certain battles Nilya, taurus, adeline, salus and morfir, all ultimates geared up and ready from first 6 battles gets the job done in cof in about 8-10 minutes every day. Quick and easy run through. Although, i do agree even with knowing it's only gonna take me 10 minutes or less to complete I still have to talk myself up to do it. It's become a daily daunting/annoying task that I dread having to do. Not because of difficulty in any way but simply because it's just old and repetitive. If I didn't constantly need the gold it gives I would never again touch cof. EVER!!! LOL. Also, against teams that have petros just run valan, Batman, vulko, sylphi and alecia. Valan protection should last long enough to defend your sylphi from harm. Alecia ult usually bring the entire team down to about 1/8 their max health (who ever actually survives it) and then sylphi just finishes them off. Batman and vulko there for insurance.
I could go for a Cheese Burger right about now.... Just sayin