Teamwork

Those who are helping roll first:

• Crit fail = -2,
• Fail = -1,
• Success +1,
• Crit Success +2

Has to be the same skill used helpfully, or a complimentary skill that would also help.
A leader can give a +1 by succeeding a Leadership roll.

You can also split tasks that could be reasonably split apart and gain the equivalent Extra Time with the additional help.