I don't know if you have double base groups or quads or what but:
I've seen level one switch-ups
you could back walkover into the bases hands (on the ground) then lift.
I don't know what to call it but you could have the main base holding the foot while the back spot and secondary base hold too persons arms they all dip and lift controlling it as the top person sit as if to do a backwards roll, rolls back halfway ten rolls back to the group with the assistance of the two with arm/ hand connection directly up into a 1/4 up to some sort of single legged stunt.
( if you're able to visualize any of that)
1/4 switch-up to one leg
Depending on the number of people in the group and what you wanted to do you could pretty much make any release move legal for level one.
You can tumble out of a cradle as long as the top person contacts the ground beforehand and maintains contact until such point as they've passed through the inverted position.
Essentially level two minus extended stunts with exception to pyramids and obviously level at which a stunt can be held.