Best Daily Posing Practice Routine for Muscle Endurance

I am transition from Powerlifting to Bodybuilding and I was not prepared for how exhausting the posing is. I can deadlift five hundred pounds but holding a front double bicep for two minutes makes me want to pass out. I need a solid daily posing practice routine to build up my muscle endurance.

I have started doing ten minutes of mandatory poses every day after my workout. I am timing how long I can hold each pose without my form breaking down. It is a completely different kind of strength than what I am used to in the gym.

How much time do you spend posing each day? I have heard some pros do it for an hour a day during peak week. I want to make sure I do not gas out during the comparisons because that is a quick way to drop in the standings. Any tips for building that specific kind of stamina?