I tried it both way an in between, and it made no difference. The main thing that seems to matter is getting into a decently deep trance state.
I must admit, I’ve not had any issues with being ‘smelly’ and offending the entities with bo or the wrong incense… I have sometimes asked for opinion on incense to burn and felt like I got a preference.
I do find being in fasted or in a ketogenic state via diet makes me feel clearer and makes TGS easier. But I have issues with the lectins in grains that fog me up.