Profit split for a flip with 4 investors

[Gerard Johnson]

Me and group of friends who want to get into learning how to flip wanted to partner in a residential foreclosure deal. Not sure how to determine profit split since the roles of each person is different. Investor A and Investor E is doing all the work and paying for the rehab costs. Investor E has the bulk of flip knowledge and experience. What is the proper way to split? I was thinking a 70/20 in which Investor A gets a return on the profit of 40%, Investor E gets a return of 37%, Investor B and C gets 8% ea return on profit, and Investor D gets 7%. 

See info below:

Property cost 152351.16

Investor A 55000

Investor B 20000

Investor C 20000

Investor D 15000

Investor E 32351.16

Please advise what you think is the best way to split profit equitable?