Split the work without a negotiation.
Roles usually get decided by talking, in the first meeting, fast. That reliably favours whoever is most comfortable negotiating out loud — which is why group research finds the barrier isn’t the work, it’s the unpredictability of talking to each other.
Everyone fills in the same short form. The split comes out of what people asked for, and every allocation says why.
One per line. If you read a brief on the home page first, the parts it found are carried over automatically.
Everyone in the group
Every person answers the same four questions. There is no question here about who you are, and no answer that marks anyone out — every option is a normal way to prefer working.
Needs at least two parts of the work, and everyone to have a name and at least one choice.