I normally decoct pilsners, dunkels etc but since i punched out 2 brews in a row i took the KISS approach and did single infusions (66C)
Although i did do a decoction mashout
My usual schedule is 50-52, then decoct to 64-65. Sometimes i do another decoction to 70, other times i skip straight to mashout. I love decoctions and if i was only doing 1 brew i would have but they are time consuming.
I never have and never will add spec malt to a pilsner. I sometimes add up to 30% munich or vienna and on 1 occasion added melanoidin.