What’s your reasoning for holding off the free summon? I would just open the session and roll the colors I hope to get - in the case that you pull one of the units you’re hoping for, it makes it easier to walk away from the banner if the new heroes are better.
In contrast, I don’t see the benefit for waiting. You’re going to roll the free summon eventually anyway, and woul you really close a session of all green/grey orbs just because another banner is superior?
I prefer to know if I am willing to pull from the banner before doing my free summon too.
If I don't plan to pull at all, I just get the free summon and get out of it.
If I play to pull (meaning upgrading my pity rate), I pull the free summon and the whole circle too.
That means 5 summons for 15 orbs instead of 20.
That's still 15 orbs I could have spared if I don't want to pull from the banner again