Three page presentation to highlight financial health/insights of target Series B company

Merry Xmas all, I am working on a case study for a VC fund that specializes in industrial SaaS that is evaluating a industrial SaaS company with $20M investment in a $100M Series B round with a premoney valuation of $350M. 

I need to complete the financial forecast for this company and prepare a 3 page presentation highlighting the financial health of this business and other insights. 

I was given a 8 quarters info of revenue segments, this company has recurring revenue, hardware revenue and professional services revenue - I have to give assumptions for: each quarter 

1. S&M as % of revenue 

2. R&D as % of revenue

3. G&A as % of revenue

And also balance sheet assumptions: 

AR days

Inventory days

AP Days

I want to ask: 

1. Would it be better to come up with an assumption based on industrial benchmarks (currently I am using median S&M/R&D/G&A % of revenue from companies of $20M-$50M ARR, which is where this company is currently at) or any methods would be better?

2. The balance sheet assumptions are the ones that I am having tough time coming up with. I am also trying to look for benchmarks but Pitchbooks and CapIQ searches doesn't show such details in balance sheet of the companies

3. To highlight the financial health of company, what type of chart should I show for: growth, margin profile and cash inflows/outflows over the next 8 quarters, and what type of insights would VC fund be interested in (currently I am thinking SaaS magic number and Rule of 40, based on the information that is available in the case study)

Thanks all!