This is something especially useful with mushroom tea & 2C-B as both have comparatively consistent, comparatively uncomplicated onsets.

In a group setting I recommend handing out rattles and putting up relatively normal music 20-30 minutes before intake.

Let everyone come up to temp, shake their instruments along to the rhythm and then hand out the goods during a lull in activity.

Then, go outside as the sun sets with everyone already lightly buzzing and accustomed to being in a ritual like mindset and many of the come-up issues will be heavily mitigated.

If you have a guitar and campfire songs it'll be even more ideal. Don't be afraid to get cheesy. Too much cheese is always better than too much warbling seriousness at the wrong time.

When we deal with newcomers the absolutely last thing we want is too much noise, too much silence, too much socialization or too much isolation. Singing, rattling and gazing together before the brunt of the effect hits is how we mitigate these issues and insure they do not get thrown to the wolves of their own mind quite as easily.

You cannot control the trip. But you can massively improve the come-up.